Rhynchocephalia
plural noun
Rhyn·cho·ce·pha·lia
ˌriŋ(ˌ)kōsə̇ˈfālyə,
-ālēə
: 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
rhynchocephalic
adjective
-¦falik
rhynchocephalous
adjective
¦⸗(ˌ)⸗¦sefələs
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Merriam-Webster unabridged
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