| 单词 | gymnosperm |
| 释义 | gymnosperm (once / 87551 pages) n WORD FAMILY gymnosperm: gymnosperms USAGE EXAMPLESThey acted, Dr Labandeira thinks, as pollinators for the gymnosperm trees that preceded modern angiosperms, now the food plants of real butterflies. Economist(Feb 04, 2016) Like cycads — their gymnosperm relatives — and ferns, the ginkgo produces motile sperm. New York Times(Oct 29, 2015) The Gymnosperms, the naked seed plants that include ferns and conifers, make seeds only -- no fruit. Scientific American(Sep 08, 2015) n plants of the class Gymnospermae having seeds not enclosed in an ovary Hypo|Hyper progymnosperm an ancestral fossil type from which modern gymnosperms are thought to have derived Welwitschia mirabilis, welwitschiacurious 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 cycadany tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves pteridosperm, seed fernan extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae) Cycas revoluta, sago palmdwarf palmlike cycad of Japan that yields sago zamiaany of various cycads of the genus Zamia; among the smallest and most verdant cycads ceratozamiaa small cycad of the genus Ceratozamia having a short scaly woody trunk and fernlike foliage and woody cones; Mexico dioonany cycad of the genus Dioon; handsome palmlike cycads with robust crowns of leaves and rugged trunks encephalartosany of numerous cycads of the genus Encephalartos having stout cylindrical trunks and a terminal crown of long often spiny pinnate leaves Encephalartos caffer, kaffir breadSouth African cycad; the farinaceous pith of the fruit used as food macrozamiaany treelike cycad of the genus Macrozamia having erect trunks and pinnate leaves and large cones with sometimes edible nuts; Australia Macrozamia communis, Macrozamia spiralis, burrawonglarge attractive palmlike evergreen cycad of New South Wales phanerogam, seed plant, spermatophyte plant that reproduces by means of seeds not spores |
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