Entry 1 sense Webster, 1913 Pterygomaxillary · Pter·y·go·max·il·la·ry · IPA /ˌtɛɹ.əɡ.oʊˈmæk.səˌlɛɹ.i/ 01 a. Of or pertaining to the inner pterygoid plate, or pterygoid bone, and the lower jaw. 1. Of or pertaining to the inner pterygoid plate, or pterygoid bone, and the lower jaw.(Anat.)