单词 hypoblast 释义 hypoblast|hp-, hapblst|[f. hypo- 2 + -blast. Cf. F. hypoblaste.]1. Bot. The flat dorsal cotyledon of a grass. ? Obs.[1830Lindley Nat. Syst. Bot. 296 Esenbeck..seems to entertain the opinion that this cotyledon [of grasses] is a specia...