单词 acotyledon 释义 acotyledon Bot.|ktlidn|[f. mod.L. acotyldones, f. Gr. ἀ without + ώ a cup-shaped hollow, also the plant Navel-wort, and in mod. Bot. a seed-lobe, f. a hollow, cup. It provides a sing. for the L. word, which is often retained uncha...