urochord
英
['jʊərəkɔːd]
美
['jʊrəˌkɔːd]
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Noun:
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primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva
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a notochord of a larval tunicate typically confined to the caudal region
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海词词典,十七年品牌