gemmule


gemmule
n. [L. gemma, bud]
1. A bud-like outgrowth that becomes an independent individual.
2. (PORIFERA)
Composed of a mass of archaeocytes charged with reserves and enclosed in a non-cellular protective envelope.
2. Historically a particle of heredity, hypothesized by Darwin, carried in the cells and able to move to the sex cells that allowed environment to influence inheritance directly.

Online Dictionary of Invertebrate Zoology. . 2005.

Synonyms:

Look at other dictionaries:

  • gemmule — [ ʒemyl ] n. f. • 1808; lat. gemmula, dimin. de gemma → gemme ♦ Bot. Bourgeon de l embryon, partie sommitale de la plantule appelée à se développer en pousse feuillue. ⇒ plumule. ● gemmule nom féminin (latin gemmula, petite gemme) Bourgeon… …   Encyclopédie Universelle

  • Gemmule — Gem mule, n. [L. gemmula, dim. of gemma: cf. F. gemmule. See {Gem}.] 1. (Bot.) (a) A little leaf bud, as the plumule between the cotyledons. (b) One of the buds of mosses. (c) One of the reproductive spores of alg[ae]. (d) An ovule. [1913… …   The Collaborative International Dictionary of English

  • gemmule — [jem′yo͞ol΄] n. [Fr < L gemmula, dim. of gemma, a bud: see GEM] Biol. a bud of a moss or a reproductive body of an alga or of certain sponges; small gemma …   English World dictionary

  • Gemmule — Au cours du processus de la germination, la gemmule se développe (après la radicule) et donne une tige feuillée au dessus des deux cotylédons. Le premier entre nœud donne le mésocotyle. Le deuxième entre nœud donne l épicotyle. Portail de la… …   Wikipédia en Français

  • gemmule —   n. small gemma.    ♦ gemmulation, n. production of gemmule.    ♦ gemmuliferous, a. bearing gemmules …   Dictionary of difficult words

  • gemmule — n. an encysted embryonic cell cluster in sponges. Etymology: F gemmule or L gemmula little bud (as GEM) …   Useful english dictionary

  • gemmule — noun Etymology: French, from Latin gemmula, diminutive of gemma Date: circa 1828 a small bud: a. a theoretical particle proposed in the theory of pangenesis that is shed by a somatic cell and contains all the information necessary to reproduce… …   New Collegiate Dictionary

  • Gemmule — Gemmules are internal buds found in freshwater sponges and are the result of asexual reproduction, and resemble round, food filled balls. Gemmules have a protective coat composed of spicules and organic matter. They are resistant to desiccation… …   Wikipedia

  • gemmule — /jem yoohl/, n. 1. Bot. gemma. 2. Zool. an asexually produced mass of cells that is capable of developing into an animal, as a freshwater sponge. 3. Evolution. one of the hypothetical living units conceived by Darwin in the theory of pangenesis… …   Universalium

  • gemmule — noun A small gemma or bud of dormant embryonic cells produced by some freshwater sponges 1978 Patricia R. Bergquist, Sponges See Also: gemmulation …   Wiktionary


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