nucellus [ noo- sel- uh s, nyoo- ] SHOW IPA / nuˈsɛl əs, nyu- / PHONETIC RESPELLING EXAMPLES | WORD ORIGIN noun, plural nu·cel·li . [noo- sel-ahy, nyoo-] /nuˈsɛl aɪ, nyu-/ . Botany the central cellular mass of the body of the ovule, containing the embryo sac. Nearby words nubian desert
nuci- Origin of nucellus 1880–85;
) nut +
-ella -elle Related forms nu·cel·lar, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for nucellus
The hilum or base of the seed, and the chalaza or base of the
nucellus are united by means of the raphe r.
The Insemineae include forms in which the
nucellus is not developed, and therefore there can be no seed.
The connexion between the base of the ovule and the base of the
nucellus is kept up 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. British Dictionary definitions for nucellus noun plural -li ( -laɪ) the central part of a plant ovule containing the embryo sac Derived Forms nucellar, adjective Word Origin for nucellus
C19: New Latin, from Latin
nucella, from nux nut
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Science definitions for nucellus Plural nucelli ( nōō-sĕl) ′ī 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
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