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A vascular plant, such as a cycad or conifer, whose seeds are not enclosed within an ovary.
[From New Latin Gymnospermae, former class name, from Greek gumnospermos : gumnos, naked; see nogw- in Indo-European roots + sperma, seed; see sperm1.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Botany) 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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any nonflowering plant having seeds that are not enclosed in fruit at the time of pollination; any conifer, cycad, or ginkgo.
[1820–30; < New Latin gymnospermae (pl.)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Any of a group of plants that produce seeds that are not enclosed in a fruit or ovary. Most gymnosperms are cone-bearing trees or shrubs. Seeds develop next to the inside surface of the scales of female cones. Gymnosperms include the conifers, the cycads, and the ginkgo. Compare angiosperm.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||gymnosperm - plants of the class Gymnospermae having seeds not enclosed in an ovary|
class Gymnospermae, division Gymnospermophyta, Gymnospermae, Gymnospermophyta - plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida)
progymnosperm - an ancestral fossil type from which modern gymnosperms are thought to have derived
welwitschia, Welwitschia mirabilis - curious plant of arid regions of southwestern Africa having a yard-high and yard-wide trunk like a turnip with a deep taproot and two large persistent woody straplike leaves growing from the base; living relic of a flora long disappeared; some may be 700-5000 years old
cycad - any tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.