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angiosperm

[an-jee-uh-spurm]
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noun Botany.
  1. a plant having its seeds enclosed in an ovary; a flowering plant.
Compare gymnosperm.

Origin of angiosperm

angio- + -sperm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for angiosperm

angiosperm

noun
  1. any seed-bearing plant of the phylum Angiospermophyta (division Angiospermae in traditional systems), in which the ovules are enclosed in an ovary, which develops into the fruit after fertilization; any flowering plantCompare gymnosperm
Derived Formsangiospermous, 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

Word Origin and History for angiosperm

n.

1853, from Modern Latin Angiospermae, coined 1690 by German botanist Paul Hermann (1646-1695), from Greek angeion "vessel" (see angio-) + spermos, adjective from sperma "seed" (see sperm). So called because the seeds in this class of plants are enclosed.

Online Etymology Dictionary, © 2010 Douglas Harper
angiosperm in Science

angiosperm

[ăn′jē-ə-spûrm′]
  1. Any of a large group of plants that produce flowers. They develop seeds from ovules contained in ovaries, and the seeds are enclosed by fruits which develop from carpels. They are also distinguished by the process of double fertilization. The majority of angiosperms belong to two large classes: monocotyledons and eudicotyledons. The angiosperms are the largest phylum of living plants, existing in some 235,000 species. They range from small floating plants only one millimeter (0.04 inch) in length to towering trees that are over 100 meters (328 ft) tall. Compare gymnosperm.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.