columella

(redirected from columellae)
Also found in: Dictionary, Thesaurus, Encyclopedia.

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 ?
Pollen tricolporate, rarely tricolpate, microechinate with small puncta to echinate, ectosexine very compact, endosexine with stout and ramified columellae.
The infratectum is 1.2-1.5 [micro]m thick, comprising two distinct, columellae layers separated by a single compact or spongy tectum.
The infratectum is 1-1.2 [micro]m thick, comprising a single columellae layer subtended by a single spongy internal rectum.
The columellae of this layer are aggregated or evenly distributed and not swollen at: the base.
1.5 [micro]m thick, comprising two indistinct columellae layers separated by multiple compact internal tecta.
The infratectum is 1.6-2.5 [micro]m thick, comprising two indistinct columellae layers separated by a single, compact internal tectum.
The columellae are evenly-distributed and not swollen at the base.
The columellae of the inner layer are aggregated under lophae and not swollen at the base.
The infratectum is 1.3-1.7 [micro]m thick, comprising two indistinct columellae layers separated by a single, compact, internal tectum.
The outer layer of fine columellae is 1-1.2 [micro]m thick, the inner 1.5-2 [micro]m thick, comprising very thick columellae which are highly branched at the distal end but not swollen at the base, and are evenly distributed around the grain.