nu·​cel·​lus nü-ˈse-ləs How to pronounce nucellus (audio)
plural nucelli nü-ˈse-ˌlī How to pronounce nucellus (audio)
: the central and chief part of a plant ovule that encloses the female gametophyte
nucellar adjective

Word History


New Latin, from Latin nucella small nut, from nuc-, nux nut — more at nut

First Known Use

1882, in the meaning defined above

Time Traveler
The first known use of nucellus was in 1882

Dictionary Entries Near nucellus

Cite this Entry

“Nucellus.” Dictionary, Merriam-Webster, Accessed 2 Oct. 2023.

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