rhomboid (n.)youdaoicibaDictYouDict[rhomboid 词源字典]
1560s, from Middle French rhomboide or directly from Late Latin rhomboides, from Greek rhomboeides "rhomboidal; a rhomboid;" see rhombus + -oid. Related: Rhomboidal. As an adjective from 1690s.[rhomboid etymology, rhomboid origin, 英语词源]