caryopsis

n.; pl. Caryopses [ NL., fr. gr. &unr_; hut, kernel + &unr_; sight, form. ] (Bot.) 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. [ 1913 Webster ]