| 单词 | protochordates |
| 释义 | Protochordata /prō-tō-kör-dāˈtə/ (zoology)plural nounA division of the Chordata comprising the Cephalochordata, Hemichordata and Urochordata (ie all members of the Chordata except the vertebrates), marine animals distinguished by the absence of a cranium, of a vertebral column and of specialized anterior sense organs ORIGIN: proto- and Chordata (see chordate under chord2) prōtōchordˈate noun and adjective |
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