gymnosperm

[ jim-nuh-spurm ]

/ ˈdʒɪm nəˌspɜrm /

noun Botany.

a vascular plant having seeds that are not enclosed in an ovary; a conifer or cycad.

Compare angiosperm.

Origin of gymnosperm

First recorded in 1820–30, gymnosperm is from the New Latin word gymnospermae name of type. See gymno-, -sperm

OTHER WORDS FROM gymnosperm

gym·no·sperm·ism, noun

Words nearby gymnosperm

gymnodinium, gymnogynous, gymnoplast, gymnorhinal, gymnosophist, gymnosperm, gymnospermous, gymnospore, gympie, gym shoe, gymslip

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for gymnosperm

gymnosperm

/ (ˈdʒɪmnəʊˌspɜːm, ˈɡɪm-) /

noun

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 phylaCompare angiosperm

Derived forms of gymnosperm

gymnospermous, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for gymnosperm

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.

单词	gymnosperm
释义	gymnosperm [ jim-nuh-spurm ] / ˈdʒɪm nəˌspɜrm / noun Botany. a vascular plant having seeds that are not enclosed in an ovary; a conifer or cycad. Compare angiosperm. Origin of gymnosperm First recorded in 1820–30, gymnosperm is from the New Latin word gymnospermae name of type. See gymno-, -sperm OTHER WORDS FROM gymnosperm gym·no·sperm·ism, noun Words nearby gymnosperm gymnodinium, gymnogynous, gymnoplast, gymnorhinal, gymnosophist, gymnosperm, gymnospermous, gymnospore, gympie, gym shoe, gymslip Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for gymnosperm gymnosperm / (ˈdʒɪmnəʊˌspɜːm, ˈɡɪm-) / noun 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 phylaCompare angiosperm Derived forms of gymnosperm gymnospermous, adjective Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for gymnosperm 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
随便看	arachnoid granulation arachnoiditis arachnoid membrane arachnoid villus arachnology arachnophobia arad araeostyle araeosystyle arafat arafat, yasir arafura sea aragats arago man aragon aragonese aragonite araguarí araguaya araguaía arakan yoma araks araldite aralen aralia