noun
definition
Acronym of science, technology, engineering, (and) mathematics.
noun
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An electron microscope that transmits a very narrow beam of electrons through a sample; it can detect individual large or heavy atoms.
noun
definition
A gleam of light; a flame.
noun
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The stock of a family; a race or generation of progenitors.
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A branch of a family.
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An advanced or leading position; the lookout.
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The above-ground stalk (technically axis) of a vascular plant, and certain anatomically similar, below-ground organs such as rhizomes, bulbs, tubers, and corms.
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A slender supporting member of an individual part of a plant such as a flower or a leaf; also, by analogy, the shaft of a feather.
example
the stem of an apple or a cherry
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A narrow part on certain man-made objects, such as a wine glass, a tobacco pipe, a spoon.
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The main part of an uninflected word to which affixes may be added to form inflections of the word. A stem often has a more fundamental root. Systematic conjugations and declensions derive from their stems.
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A person's leg.
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The penis.
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A vertical stroke of a letter.
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A vertical stroke marking the length of a note in written music.
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A premixed portion of a track for use in audio mastering and remixing.
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The vertical or nearly vertical forward extension of the keel, to which the forward ends of the planks or strakes are attached.
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A component on a bicycle that connects the handlebars to the bicycle fork
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A part of an anatomic structure considered without its possible branches or ramifications.
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A crack pipe; or the long, hollow portion of a similar pipe (i.e. meth pipe) resembling a crack pipe.
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(chiefly British) A winder on a clock, watch, or similar mechanism
verb
definition
To remove the stem from.
example
to stem cherries; to stem tobacco leaves
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To be caused or derived; to originate.
example
The current crisis stems from the short-sighted politics of the previous government.
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To descend in a family line.
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To direct the stem (of a ship) against; to make headway against.
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To hit with the stem of a ship; to ram.
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To ram (clay, etc.) into a blasting hole.
verb
definition
To stop, hinder (for instance, a river or blood).
example
to stem a tide
definition
To move the feet apart and point the tips of the skis inward in order to slow down the speed or to facilitate a turn.
Examples of stems in a Sentence
Both have fleshy caps, whitish, moist and clammy to the touch; instead of a pleasant odour, they have a disagreeable one; the stems are ringless, or nearly so; and the gills, which are palish-clay-brown, distinctly touch and grow on to the solid or pithy stem.
The absence of the ordinary bright green colours of vegetation is another peculiarity of this flora, almost all the plants having glaucous or whitened stems. Foliage is reduced to a minimum, the moisture of the plant being stored up in massive or fleshy stems against the long-continued drought.
The fresh-water spider (Argyroneta) lives amongst the weeds of lakes and ponds and, like Desis, is quite at home beneath the water either swimming from spot to spot or crawling amongst the stems of aquatic plants.
How do you think it feels to live with the regret that stems from having done something beyond reparation to someone as beautiful as she is in this life?
It is the principal genus of the natural order of Monocotyledous Potamogetonaceae, and contains plants with slender branched stems, and submerged and translucent, or floating and opaque,.
The fructification appears in March and April, terminating in short unbranched stems. It is said to produce diarrhoea in such cattle as eat it.
In this species the fructification is conical or lanceolate, and is found in April on short, stout, unbranched stems which have large loose sheaths.
Solitary polyps are unknown in this sub-order; the colony may be creeping or arborescent in form; if the latter, the budding of the polyps, as already stated, is of the sympodial type, and either biserial, forming stems capable of further branching, or uniserial, forming pinnules not capable of further branching.
This is the case in the stems of must Phanerogams and of some Pteridophytes.
The in Stems. bundles of plants which form cambium are, on the contrary, called open.
In stems with open bundles the formation of cambium and secondary tissue may be confined to these, when it is sard to be entirely fascicular.
A peculiar modification of periderm is formed by the phellogen in the submerged organs (roots or stems) of many aquatic or marsh-loving plants.
This pressure leads to the filling of the vessels of the wood of both root and stem in the early part of the year, before the leaves have expanded, and gives rise to the exudation of fluid known as bleeding when young stems are cut in early spring.
In such stems and roots as increase in thickness there are other growing regions, which consist of cylindrical sheaths known as cambium layers or phellogens.
The young roots grow vertically downwards, the young stems vertically upwards.
But some stems grow parallel to the surface of the soil, while the branches both of stems and roots tend to grow at a definite angle to the main axis from which they come.
They may occur on all parts, buds, leaves, stems or roots, as shown by the numerous species of Cynips on oak, Phylloxera on vines, &c. The local damage is small, - but the general injury to assimilation, absorption and other functions, may be important if the numbers increase.
Schinzia, which forms galllike swellings on the roots of rushes; Gymnosporangium, causing excrescences on juniper stems; numerous leaf Fungi such as Puccinia, Aecidium, Sep/one, &c., causing yellow, brown or black spots on leaves; or Ustilago in the anthers of certain flowers.
Fungus-galls on leaves and stems are exemplified by the pocket-plums caused by the Exoasceae, the black blistering swellings of Ustilago Maydis, the yellow swellings on nettles due to Aecidium, &c.
The submerged stems are slender or hollow.
The stems are frequently characterized by aeration channels, which connect the aerial parts with the parts which are buried in practically airless mud or silt.
The obturatorius nerve invariably comes from the two main stems of the crural.
The vegetable-feeders attack leaves, herbaceous or woody stems and roots; frequently different parts of a plant are attacked in the two active stages of the life-history; the cockchafers, for example, eating leaves, and their grubs gnawing roots.
Many species produce gums and resins, their stems being encrusted with the exudations, and pungency and aromatic odour is an almost universal quality of the plants of desert regions.
The tree breaks into thin stems close to the ground, and these branch again and again, the leaves being developed umbrellafashion on the outer branches.
Obelia forms numerous polyserial stems of the characteristic zigzag pattern growing up from a creeping basal stolon, and buds the medusa of the same name.
In addition to the stems bearing cups, there are found vesicles associated with them, which have been interpreted as gonothecae or as floats, that is to say, air-bladders, acting as hydrostatic organs for a floating polyp-colony.
This is probably homologous with the hydrom cylinder in the stems of other mosses.
Beetles and larvae are frequently carnivorous in habit, hunting for small insects under stones, or pursuing the soft-skinned grubs of beetles and flies that bore in woody stems or succulent roots.
The larvae of the beautiful, elongate, metallic Donaciae live in the roots and stems of aquatic plants, obtaining thence both food and air.
When cut open, it displays an infinity of tiny leaf-buds and stems, and at intervals there exudes from it an aromatic resin, which from its astringent properties is used by the shepherds as a vulnerary, but has not been converted to any commercial purpose.
The trunk is usually flattened, and twisted as though composed of several stems united; the bark is smooth and light grey; and the leaves are in two rows, 2 to 3 in.
The nature of the integument and its hairy clothing in all spiders enables them to be plunged under water and withdrawn perfectly dry, and many species, even as large as the common English house-spider (Tegenaria), are so lightly built that they can run with speed over the surface of standing water, and this faculty has been perfected in genera like Pirata, Dolomedes and Triclaria, which are always found in the vicinity of lakes or on the edges of rivers and streams, readily taking to the water or running down the stems of water plants beneath its surface when pursued.
They are bulbous plants, the slender stems of which support themselves by tendril-like prolongations of the tips of some of the narrow generally lanceolate leaves.
It stretches forward as far as the brain, and in Carinella is again continued in front of it, whereas in the Heteronemertines the innervation of the anterior extremity of the head, in front of the brain, takes the form of more definite and less numerous branching stems. The presence of this plexus in connexion with the central stems, sending out nervous filaments amongst the muscles, explains the absence, in Pro-, Mesoand Heteronemertines, of separate and distinct peripheral nerve stems springing from the central stems innervating the different organs and body-regions, the only exceptions being the L.N.
In the Metanemertini, where the longitudinal stems lie inside the muscular body-wall, definite and metamerically placed nerve branches spring from them and divide dichotomously in the different tissues they innervate.
In others there is an approximation of the lateral stems towards the median ventral line (Drepanophorus); in a genus of Heteronemertines (Langia), on the other hand, an arrangement occurs by which the longitudinal stems are no longer lateral, but have more or less approached each other dorsally.
It lives on the shores of lakes and rivers, swimming and diving with facility, feeding on the roots, stems and leaves of water-plants, or on fruits and vegetables which grow near the margin of the streams it inhabits.
When, as with some plants like Verbascum, the thick hard stems are liable to cause the leaves to wrinkle in drying by removing the pressure from them, small pieces of bibulous paper or cotton wool may be placed upon the leaves near their point of attachment to the stem.
It is limited to Disco Island, and perhaps to a small part of the Noursoak Peninsula, and the neighbouring country, and consists of numerous thin beds of sandstone, shale and coal - the sideritic shale containing immense quantities of leaves, stems, fruit, &c., as well as some insects, and the coal pieces of retinite.
Castren considers that three of their stems are of Ostiak origin, the remainder being Samoyedic. The Kamasins, in the Kansk district of Yeniseisk, are either herdsmen or agriculturists.
They speak a language with an admixture of Tatar words, and some of their stems contain a large Tatar element.
The rubber is obtained by incising the stems of the vines and coagulating the latex by exposure, by admixture with acid vegetable juices or by heating.
The vines grow upon forest trees, and the stems are periodically tapped.
One of the commonest tropical weeds, Evolvulus alsinoides, has slender, long-trailing stems with small leaves and flowers.
They are generally perennial herbs with a creeping underground stem and erect, unbranched, aerial stems, bearing slender Juncus effusus, common rush.
Vines have woody climbing stems, with alternate, entire or palmately lobed leaves, provided at the base with small stipules.
The periodical thorough cleansing of the vine stems and every part of the houses is of the utmost importance.
The fungus is most conspicuous on the grapes, but the leaves and stems From Hartig's Lehrbuch der Pfanzenkrankheiten, by permission of Julius Springer.
It is a tall perennial grass-like plant, giving off numerous erect stems 6 to 12 ft.