plural noun
Rhyn·​cho·​ce·​pha·​lia | \ ˌriŋ(ˌ)kōsə̇ˈfālyə, -ālēə\

Definition of Rhynchocephalia

: an order of Reptilia that comprises forms resembling lizards but having biconcave vertebrae, immovable quadrate bones, and other peculiar osteological characters and that includes Sphenodon and numerous fossil genera — compare tuatara

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Other Words from Rhynchocephalia

rhynchocephalian \ ¦⸗(ˌ)⸗⸗¦fālyən, -​lēən \ adjective or noun
rhynchocephalic \ -​¦falik \ adjective
rhynchocephalous \ ¦⸗(ˌ)⸗¦sefələs \ adjective

History and Etymology for Rhynchocephalia

New Latin, from rhynch- + cephal- + -ia

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