nucellus
the central cellular mass of the body of the ovule, containing the embryo sac.
Origin of nucellus
1Other words from nucellus
- nu·cel·lar, adjective
Words Nearby nucellus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use nucellus in a sentence
The vessels of the cord are prolonged to the base of the nucellus n by means of the raphe r.
The base of the nucellus is indicated by the chalaza ch, while the apex is at the micropyle m.
The hilum or base of the seed, and the chalaza or base of the nucellus are united by means of the raphe r.
The connexion between the base of the ovule and the base of the nucellus is kept up by means of the raphe r.
The point where the integuments are united to the base of the nucellus is called the chalaza (figs. 111, 112).
British Dictionary definitions for nucellus
/ (njuːˈsɛləs) /
the central part of a plant ovule containing the embryo sac
Origin of nucellus
1Derived forms of nucellus
- nucellar, 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 nucellus
[ nōō-sĕl′əs ]
The megasporangium of a seed-bearing plant, located in the ovule. In angiosperms, it is the central portion of the ovule in which the embryo sac develops. In some cases of apomixis (production of seeds without fertilization), cells of the nucellus develop into an embryo.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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