Word Finder - leaf

definition

The usually green and flat organ that represents the most prominent feature of most vegetative plants.

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Anything resembling the leaf of a plant.

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A sheet of any substance beaten or rolled until very thin.

example

gold leaf

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A sheet of a book, magazine, etc (consisting of two pages, one on each face of the leaf).

synonyms

• folium

definition

(in the plural) Tea leaves.

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A flat section used to extend the size of a table.

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A moveable panel, e.g. of a bridge or door, originally one that hinged but now also applied to other forms of movement.

example

The train car has one single-leaf and two double-leaf doors per side.

definition

A foliage leaf or any of the many and often considerably different structures it can specialise into.

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In a tree, a node that has no descendants.

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The layer of fat supporting the kidneys of a pig, leaf fat.

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One of the teeth of a pinion, especially when small.

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Marijuana.

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(4chan) A Canadian person.

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To produce leaves; put forth foliage.

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To divide (a vegetable) into separate leaves.

example

The lettuce in our burgers is 100% hand-leafed.

There was evaporation of water from the leaf.

He looked relieved and reached up, pulling a leaf from her hair.

I hung up, my hand still shaking like a leaf in a windstorm.

A golden leaf floated down in the cool morning mist and joined a carpet of others under the tree.

He raised the leaf again, unable to take his eyes off it.

Hardly a leaf is visible to the height of one's head; but above, a crown of thick leather-like leaves shuts out the sunlight.

The centre of the leaf is often occupied by a midrib consisting of several layers of cells.

Sarah would say, "Seen one orange leaf, seen 'em all."

She shook like a leaf in a thunderstorm, her warm brown eyes wide and tears streaming down her cheeks.

I remember well one gaunt Nimrod who would catch up a leaf by the roadside and play a strain on it wilder and more melodious, if my memory serves me, than any hunting-horn.

The leaf is therefore tricostate.

Disturbed, he folded the leaf and placed it in his pocket.

In other cases the trace passes inwards and joins the central hydrom strand, so that a connected water-conducting system between stem and leaf is established.

Accepting this view of the phylogeny of the leaf, the perianthleaves (sepals and petals) and the foliage-leaves may be regarded as modified or metamorphosed sporophylls; that is, as leaves which are adapted to functions other than the bearing of spores.

The overhanging leaf sees here its prototype.

The surface of the leaf, especially the laminar wing, bears glands which in spring exude large glistening dr„ r, s of nectar.

In many cases the cells bordering the leaf are produced into teeth, and very frequently they are thick-walled so as to form a supporting rim.

In the larger veins of the leaf especially in the midrib, in the petiole, and in the young stem, a1 extremely frequent type of mechanical tissue is collenchyma.

What mysterious force guided the seedling from the dark earth up to the light, through leaf and stem and bud, to glorious fulfilment in the perfect flower?

Among the Merchiston papers is a thin quarto volume in Robert Napier's writing containing a digest of the principles of alchemy; it is addressed to his son, and on the first leaf there are directions that it is to remain in his charter-chest and be kept secret except from a few.

Insects are attracted to the mouth of the pitcher by a series of glands, yielding a sweet excretion, which occurs on the stem and also on the leaf from the base of the leaf-stalk to the lid and peristome.

Insects, especially running insects, which have followed the track of honey glands upwards from the stem along the leaf, reach the mouth of the pitcher, and in their efforts to sip the attractive marginal glands fall over into the liquid.

Laymen may read the book of nature, and Man himself is the most important " leaf " in it.

In Caulerpa the imitation of a higher plant by the differentiation of fixing, supporting and assimilating organs (root, stem and leaf) from different branches of the single cell is strikingly complete.

These are elongated in the direction of the length of the leaf, are always poor in chlorophyll and form a channel for conducting the products of assimilation away from the leaf into the stem.

In other cases the leaf-gaps are very broad and long, the meristeles separating them being reduced to comparatively slender strands, while there is present in each gap a network of fine vascular threads, some of which run out to the leaf, while others form cross-connections between these leaf-trace strands and also with the main cauline meristeles.

The leaf trace of any given leaf rarely consists of a single bundle only (unifascicular); the number of bundles of any given trace is always odd; they may either be situated all together before they leave the stele or they may be distributed at intervals round the stele.

The process of embedding gold and silver leaf between two layers of glass originated as early as the 1st century, probably in Alexandria.

While the tendril is thus diverted from its original direct course, the axillary bud of the leaf opposite the tendril begins a new podium, by lengthening into a shoot which assumes the direction the tendril had prior to its deflexion.

The Spigelian (s) and caudate lobes (c) belong to the right half of the liver, the latter being usually a leaf shaped lobe attached by its stalk to the Spigelian, and having its blade flattened between the right lateral lobe and the right kidney.

The bulk of the leaf tea, however, now goes to Russia by direct steamers to Odessa instead of to London as formerly, and a large quantity goes overland via Tientsin and Siberia in the form of brick tea.

The whole tree itself is but one leaf, and rivers are still vaster leaves whose pulp is intervening earth, and towns and cities are the ova of insects in their axils.

Some hydathodes are active glands, secreting the water they expel from the leaf.

In the blade of a typical leaf of a vascular plantessentially a thin plate of assimilating tissuethe vascular system takes the form of a number of separate, usually branching and anastomosing strands.

In many Pteridophytes thi first leaf is formed very early, and the first vascular strand i!

In this case also the differentiation of leaf-bundles, which typically begins at the base of the leaf and extends upwards into the leaf and downwards into the stem, is the first phenomenon in the development of vascular tissue, and is seen at a higher level than the formation of a stele.

A layer of cork is regularly formed in most Phanerogams across the base of the petiole before leaf fall, so as to cover the wound caused by the separation of the leaf from the stem.

Brown and Escombe have shown that the amount of solar energy taken up by a green leaf may often be fifty times as much as it can utilize in the constructive processes of which it is the seat.

What is not used in the constructive processes is employed in the evaporation of the water, the leaf being thus kept cool.

Whether the leaf is brightly or only moderately illuminated, the same relative proportions of the total energy absorbed are devoted to the purposes of composition and construction respectively.

The growth of the leaf is at first apical, but this is not very prolonged, and the subsequent enlargement is due to an intercalary growing region near the base.

If we consider a leaf of the common fern we find that in its young condition it is closely rolled up, the upper or ventral surface being quite concealed.

When the pinnate leaf of a Mimosa pudica, the so-called sensitive plant, is pinched or struck, the leaf droops rapidly and the leaflets become approximated together, so that their upper surfaces are in contact.

The mechanism is applied to the capture of insects alighting on the leaf.

When these are excited by the settling of an insect on the leaf they slowly bend over and imprison the intruder, which is detained there meanwhile by a sticky excretion poured out by the glands.

If the leaf of Mini osa or Desmodium be examined, it will be seen that at the base of each leaflet and each leaf, just at the junction with the respective axes, is a swelling known as a pulvinus.

In the erect position of the leaf the lower side has its cells extremely turgid, and the pulvinus thus forms a cushion, holding up the petiole.

On stimulation these cells part with their water, the lower side of the organ becomes flaccid and the weight of the leaf causes it to fall.

Similar turgescence changes, taking place with similar rapidity in the midrib of the leaf of Dionaea, explainthe closing of the lobes upon their hinge.

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.