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nucellus

American  
[noo-sel-uhs, nyoo-] / nuˈsɛl əs, nju- /

noun

Botany.
  • nucelli
    plural
  1. the central cellular mass of the body of the ovule, containing the embryo sac.


nucellus British  
/ njuːˈsɛləs /

noun

  1. the central part of a plant ovule containing the embryo sac

"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

nucellus Scientific  
/ no̅o̅-sĕl′əs /
  • nucelli
    plural
  1. 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.


Other Word Forms

Derived Forms

Inflected Forms

Nouns


Etymology

Origin of nucellus

1880–85; < New Latin, equivalent to Latin nuc- (stem of nux ) nut + -ella -elle


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

In a species of Allium, embryos have been found developing in the same individual from the egg-cell, synergids, antipodal cells and cells of the nucellus.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 by Various

The connexion between the base of the ovule and the base of the nucellus is kept up by means of the raphe r.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" by Various

The vessels of the cord are prolonged to the base of the nucellus n by means of the raphe r.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various

As the first integument grows round it, the amount of inversion increases, and the funicle becomes adherent to the side of the nucellus.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" by Various

A young ovule consists of a conical nucellus surrounded by a single integument terminating as a two-lipped micropyle.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" by Various

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