caryopsis

n. dry fruit that resembles a seed produced by grasses and cereal crops

In botany, a caryopsis is a type of simple dry fruit — one that is monocarpelate (formed from a single  carpel) and indehiscent (not opening at maturity) and resembles an achene, except that in a caryopsis the pericarp is fused with the thin seed coat. The caryopsis is popularly called a grain and is the fruit typical of the family Poaceae (or Gramineae), such as wheat, rice, and corn. The term grain is also used in a more general sense as synonymous with cereal (as in "cereal grains", which include some non-Gramineae). Considering that the fruit wall and the seed are intimately fused into a single unit, and the caryopsis or grain is a dry fruit, it is not surprising that in general usage little concern is given to technically separating the terms "fruit" and "seed" in these plant structures. In many grains, the "hulls" to be separated before processing are actually flower bracts.
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Noun
1. dry seedlike fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn
(synonym) grain
(hypernym) seed
(hyponym) amaranth

(n.)
A one-celled, dry, indehiscent fruit, with a thin membranous pericarp, adhering closely to the seed, so that fruit and seed are incorporated in one body, forming a single grain, as of wheat, barley, etc.
  

caryopsis /,kæri'ɔpsis/
danh từ, số nhiều caryopsides/,kæri'ɔpsidi:z/ (thực vật học) quả thóc
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