单词	premaxilla
释义	premaxilla noun pre·​max·​il·​la ˌprē-mak-ˈsi-lə  : either of a pair of bones of the upper jaw of vertebrates between and in front of the maxillae premaxillary (ˌ)prē-ˈmak-sə-ˌler-ē  chiefly British ˌprē-mak-ˈsi-lə-rē  adjective or noun Example Sentences Recent Examples on the Web Especially remarkable is the animal’s premaxilla – the bone formed a kind of thick, bony wing which would have helped support a large mass of soft tissues in life. Brian Switek, WIRED, 2 Nov. 2010 Word History Etymology New Latin First Known Use 1850, in the meaning defined above Medical Definition premaxilla noun pre·​max·​il·​la ˌprē-mak-ˈsil-ə  plural premaxillae -ē  : either member of a pair of bones of the upper jaw of vertebrates situated between and in front of the maxillae that in humans form the median anterior part of the superior maxillary bones but in most other mammals are distinct and bear the incisor teeth and in birds coalesce to form the principal part of the upper mandible called also incisive bone
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