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pterygoquadrate
pterygoquadrate adj. 
/ˌtɛrᵻɡə(ʊ)ˈkwɒdrət/, /ˌtɛrəɡoʊˈkwɑdrət/ of or relating to the pterygoid process and the quadrate bone; spec. designating a cartilage forming the upper jaw in sharks, regarded as homologous to the pterygoid process and quadrate bone of other vertebrates.
Brit. /ˌtɛrᵻɡə(ʊ)ˈkwɒdreɪt/
, /ˌtɛrᵻɡə(ʊ)ˈkwɒdreɪt//ˌtɛrᵻɡə(ʊ)ˈkwɒdrət/U.S. /ˌtɛrəɡoʊˈkwɑdˌreɪt/
, /ˌtɛrəɡoʊˈkwɑdˌreɪt//ˌtɛrəɡoʊˈkwɑdrət/ΚΠ
1871 Philos. Trans. (Royal Soc.) 161 195 A slender f-shaped free metapterygoid exists above the pterygo-quadrate region.
1886 Proc. Zool. Soc. 220 The pterygo-quadrate cartilage..varies considerably in depth at different points.
1962 K. F. Lagler et al. Ichthyol. iii. 65 The second [visceral] arch is modified into the upper jaw (pterygoquadrate or maxillary cartilages) and the lower jaw (Meckel's or mandibular cartilages).
1993 Cell 75 1333/1 The appearance of an atavistic reptilian pterygoquadrate element in Hoxa-2 mutants suggests that this ground pattern is intermediate between reptiles and mammals.
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