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gymnosperm

[jim-nuh-spurm] /ˈdʒɪm nəˌspɜrm/
noun, Botany
1.
a vascular plant having seeds that are not enclosed in an ovary; a conifer or cycad.
Compare angiosperm.
Origin
1820-1830
1820-30; < Neo-Latin gymnospermae name of type. See gymno-, -sperm
Related forms
gymnospermism, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for gymnosperm

gymnosperm

/ˈdʒɪmnəʊˌspɜːm; ˈɡɪm-/
noun
1.
any seed-bearing plant in which the ovules are borne naked on the surface of the megasporophylls, which are often arranged in cones. Gymnosperms, which include conifers and cycads, are traditionally classified in the division Gymnospermae but in modern classifications are split into separate phyla Compare angiosperm
Derived Forms
gymnospermous, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for gymnosperm
gymnosperm
1830, from Fr. gymnosperme, lit. "naked seed" (i.e., not enclosed in an ovary), from Gk. gymnos "naked" + sperma "seed" (see sprout).
Online Etymology Dictionary, © 2010 Douglas Harper
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gymnosperm in Science
gymnosperm
  (jĭm'nə-spûrm')   
Any of a group of seed-bearing plants whose ovules are not enclosed in an ovary, but are exposed on the surface of sporophylls or similar structures. Each ovule may contain several eggs, all of which may be fertilized and start to develop in a process known as polyembryony. In most seeds, however, only a single embryo survives. The reproductive structures of many gymnosperms are arranged in cones. The gymnosperms do not form a distinct monophyletic grouping, but simply include all the seed-bearing plants that are not angiosperms. In addition to several extinct groups, there are four very diverse living gymnosperm phyla: the conifers, the cycads, the ginkgo (surviving in a single species), and the gnetophytes. Compare angiosperm. See more at seed-bearing plant.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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