columella

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columella

 [kol″u-mel´ah] (pl. columel´lae) (L.)
a little column.
columella na´si the fleshy external termination of the septum of the nose.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

col·u·mel·la

, pl.

col·u·mel·lae

(kol'ū-mel'ă, -mel'ē),
1. A column, or a small column. Synonym(s): columnella
2. In fungi, a sterile invagination of a sporangium, as in Zygomycetes.
[L. dim. of columna, column]
Farlex Partner Medical Dictionary © Farlex 2012

columella

(kŏl′yə-mĕl′ə, kŏl′ə-)
n. pl. colu·mellae (-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.

col′u·mel′lar (-mĕl′ər) adj.
col′u·mel′late′ (-mĕl′āt′) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

col·u·mel·la

, pl. columellae (kol'yū-mel'ă, -ē)
1. A small column.
Synonym(s): columnella.
2. In fungi, a sterile invagination of a sporangium, as in Zygomycetes.
[L. dim. of columna, column]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

columella

The ridge of skin between the nostrils.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
Columellaclick for a larger image
Fig. 117 Columella (2). The sporangium of Mucor.

columella

  1. the sterile central column in the sporangia of mosses and liverworts.
  2. the domed structure forming a pillar supporting the sporangium of some fungi, e.g. Mucor. See Fig. 117 .
  3. the central area of a root cap which contains STATOLITHS (1).
  4. the central axis of a fruit.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Columella

The strip of skin running from the tip of the nose to the upper lip, which separates the nostrils.
Mentioned in: Rhinoplasty
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Ectosexine columellate, equal to or slightly thinner than endosexine, with compact inner layer and thinner scarcely columellate outer layer.
(2) Pollen morphology (i.e., pollen surface psilate, microechinate or echinate with a densely columellate exine) is secondarily helpful for delimitating the subfamily.
lophate in some Arctoteae, Barnadesioideae, Lactuceae, and Vernonieae); and (8) exine structure always densely columellate with stout columellae (vs.
The pollen grains have the exine distinctly bilayered, with both ectosexine and endosexine clearly columellate, a pattern that is consistent throughout the tribe (Crisci, 1974a; Cabrera, 1977; Telleria et al., 2003) (112B of Figs.
The infratectum is 0.68-0.9 [micro]m in diameter and comprises a single columellate layer subtended by a single, compact internal tectum.
1 [micro]m thick and comprises a single columellate layer subtended by a single, compact internal tectum.
The infratectum is 0.9 1.1 [micro]m thick and comprises two distinct columellate layers separated by a single, compact internal tectum.
3 [micro]m thick and comprises two distinct columellate layers, separated by compact, multilayered internal tecta.