单词 subumbrella 释义 ‖ subumbrella Zool.[mod.L.; see sub- 1 f.]The internal ventral or oral disk of a hydrozoan; the concave muscular layer beneath the umbrella of a jelly-fish.1878Bell tr. Gegenbaur's Comp. Anat. 108 In the Medus it [sc. a muscular la...