Word Finder - columella

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Any of various small structures in plants or animals that are columnar in shape.

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The skin at the end of the septum which separates the nostrils.

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(comparative anatomy) In birds, reptiles, and amphibians, the small bone which carries vibration from the tympanum to the inner ear.

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In gastropods, the structure at the center of the whorls of the shell.

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The structure at the center of the calyx where the septa join together.

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The central sterile portion of the sporangium in various fungi.

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A rod-shaped reinforcing element of the sexine layer of a pollen grain.

The proOtic encloses between it and the lateral occipital the fenestra ovalis, into which fits the columella of the ear.

Monodonta, no jaws, spire not prominent, no umbilicus, columella toothed.

This columella muscle is the same thing as the muscles adhering to the shell in Patella, and the posterior adductor of Lamellibranchs.

Shell solid, piriform, with thick folded columella; lateral teeth of radula bicuspidate.

Occupying the axis, and exposed by the section, is seen the "columella " or spiral pillar.

Shell ovoid, with short spire and folded columella; foot small, no operculum; siphon short.

Columella, like Xenophon, favours a certain friendliness and familiarity in one's intercourse with his farm slaves.

Columella regarded the gains from the births as a sufficient motive for encouraging these unions, and thought that mothers should be rewarded for their fecundity; Varro, too, seems to have taken this view.

Cato, Varro and Columella all agree that slave labour was to be preferred to free except in unhealthy regions and for large occasional operations, which probably transcended the capacity of the permanent familia rustica.

In Virgil's time the varieties in cultivation seem to have been exceedingly numerous; and the varied methods of training and culture now in use in Italy are in many cases identical with those described by Columella and other Roman writers.

He wrote a poem on agriculture (De re rustica) in fourteen books, the material being derived from Columella and other earlier writers.

The work is conveniently arranged, but far inferior in every other respect to that of Columella.

The quadrate is indirectly articulated with the skull, first by the horizontal, movable squamosal, secondly by the columella auris.

After the war Lowell abandoned politics, and won for himself the title of "the Columella of New England" by his interest in agriculture - he was for many years president of the Massachusetts Agricultural Society.

Many of the instruments and processes of Portuguese agriculture and viticulture were introduced by the Romans, and are such as Columella described in the 1st century A.D.

In Ephedra helvetica, as described by Jaccard, no proembryo or suspensor is formed; but the most vigorous fertilized egg, after undergoing several divisions, becomes attached to a tissue, termed the columella, which serves the purpose of a primary suspensor; the columella appears to be formed by the lignification of certain cells in the central region of the embryo-sac. At a later stage some of the cells in the upper (micropylar) end of the embryo divide and undergo considerable elongation, serving the purpose of a secondary suspensor.

In the former case the young daughter zooid, with its corallum, arises wholly outside the cavity of the parent zooid, and the component parts of the young corallum, septa, theca, columella, &c., are formed anew in every individual produced.

Thus in the family Stauridae there are four chief septa whose inner ends unite in the middle of the calicle to form a false columella, and in the Zaphrentidae there are many instances of an arrangement, such as that depicted in fig.

To Merula we are indebted for the editio princeps of Plautus (1472), of the Scriptores rei rusticae, Cato, Varro, Columella, Palladius (1472) and possibly of Martial (1471).

Shell fusiform and solid, aperture elongated, columella folded; no operculum; eyes on sides of tentacles.

Spire of shell prominent, aperture narrow, canal very short, columella crenelated; foot large.

Shell ovoid, with short spire, wide aperture and folded columella; inferior pallial lobe thick; visceral commissure still twisted.