trocar
trocar[ˈtrəʊkɑː]noun- a surgical instrument with a three-sided cutting point enclosed in a tube, used for withdrawing fluid from a body cavity
套针,套管针(用于从体腔抽液的外科手术用具)
语源- early 18th cent.: from French trocart, trois-quarts, from trois 'three' + carre 'side, face of an instrument'
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