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- 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。
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- Subphylum Urochordata: three classes.尾索动物亚门：3纲。
(一般作tunicated)
- 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）.