caryopsis

noun
cary·​op·​sis | \ˌker-ē-ˈäp-səs, ˌka-rē-\
plural caryopses\-​ˌsēz \ also caryopsides\-​sə-​ˌdēz \

Definition of caryopsis 

: a small one-seeded dry indehiscent fruit (as of corn or wheat) in which the fruit and seed fuse in a single grain

First Known Use of caryopsis

1830, in the meaning defined above

History and Etymology for caryopsis

New Latin

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The first known use of caryopsis was in 1830

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