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 (kŏl′yə-mĕl′ə, kŏl′ə-)
n. pl. col·u·mel·lae (-mĕl′ē)
Any small columnlike structure in various plants and animals, often forming the central axis of development for the organism or an anatomical structure.

[Latin, diminutive of columna, column; see column.]

col′u·mel′lar (-mĕl′ər) adj.
col′u·mel′late′ (-mĕl′āt′) adj.


n, pl -lae (-liː)
1. (Biology) biology
a. the central part of the spore-producing body of some fungi and mosses
b. any similar columnar structure
2. (Zoology) Also called: columella auris a small rodlike bone in the middle ear of frogs, reptiles, and birds that transmits sound to the inner ear: homologous to the mammalian stapes
[C16: from Latin: diminutive of columna column]
ˌcoluˈmellar adj


(ˌkɒl yəˈmɛl ə)

n., pl. -mel•lae (-ˈmɛl i)
1. any of various small, columnlike structures of animals or plants; rod or axis.
2. the middle ear bone of amphibians, reptiles, and birds.
[1575–85; < Latin, diminutive of columna column; see -elle]
col`u•mel′lar, adj.
col`u•mel′late (-ɪt, -eɪt) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.columella - a small column (or structure resembling a column) that is a part of a plant or animal
pillar, tower, column - anything that approximates the shape of a column or tower; "the test tube held a column of white powder"; "a tower of dust rose above the horizon"; "a thin pillar of smoke betrayed their campsite"
References in periodicals archive ?
RGF1 is specifically expressed in quiescent center cells and columellar stem cells in the root tip.
The columellar muscle was separated from columella of the shell and gently removed.
Previous studies have reported six morphological characters to use when classifying Siderastrea species: corallite diameter, columella diameter, number of septa, theca thickness, columellar depth, and distance between individual corallites (Laborel, 1970, 1974; Budd and Guzman, 1994; Budd, 1980; Menezes et al.
2) However, there are some concerns about NCPAP; such as nasal trauma, deformity of nostrils, and columellar necrosis, along with discomfort of infants and difficulty in nursing care.
Correction of the secondary nasal tip and of alar and/or columellar collapse.
Columellar length angle showed significant sexual differences (Prn-N-Pog, Figure 6, colour plate III; males = 31.
Among these complications the most frequently observed ones to be considered are bleeding septal /septum perforation adhesions septal haematoma ''saddle nose'' deformity columellar retraction and losses in the tip projection.
Gonad pale beige, lying along superior and columellar surfaces of visceral whorls posterior to stomach.
Animals were brought live to the laboratory and the specimens were measured along the columellar axis to the nearest 0.
The "Veliger" stage appeared after eight to thirteen days and had well developed larval structures (bilobed veil, operculum, statocysts, foot, columellar muscle, larval heart) and a hardened globular proto-shell.
A low, medium-placed columellar lamella is present in the last two whorls, but it does not enter into the aperture.
Description: Shell of small to medium size, constricted anteriorly; maximum height of shell nearly centered; maximum width of shell slightly posterior of center; dentition coarse to medium with smooth interstices; columellar lip with 11 teeth, labral lip with 15 teeth; aperture fairly wide and straight, curved posteriorly toward columella, widens anteriorly; terminal canals deep; columella slightly inflated; prominent anterior terminal ridges form a slight marginal callus: posterior terminal ridge extended from base of spire to form a slight marginal callus; spire of medium height and partially exposed due to shell loss.