释义
n.
Zoology a marine invertebrate of a group which includes the sea squirts and salps. They have a rubbery or hard outer coat and two siphons to draw water into and out of the body.
【动】 被囊动物,尾索动物。
adj.
Botany (of a plant bulb, e.g. an onion) having concentric layers
【植】 (植物鳞茎,如洋葱)具膜被的,具皮鳞的。
词源
"mid 18th cent.: from Latin tunicatus, past participle of tunicare ‘clothe with a tunic', from tunica (see TUNICA)."