| 单词 | urochordate |
| 释义 | urochordate (extremely rare) n WORD FAMILY urochordate n primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva Syn|Hypo|Hyper tunicate, urochord ascidian minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves salp, salpaminute floating marine tunicate having a transparent body with an opening at each end doliolumfree-swimming oceanic tunicate with a barrel-shaped transparent body larvaceanany member of the class Larvacea appendiculariafree-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates sea squirtascidian that can contract its body and eject streams of water chordate any animal of the phylum Chordata having a notochord or spinal column |
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