part of part of in lateral side of contributes to morphology of sphenoid bone sphenoid bone pterygoid process MA:0002774 pterygoid processus SCTID:140390001 FMA:54682 processus pterygoideus pterygoid process pterygoid processes pterygoid process of sphenoid bone pterygoid plate AAO:0010086 UBERON:0004649 pterygoid process of sphenoid The process projecting downward from either side of the sphenoid bone, in vertebrates divided into two plates, an inner and an outer (sometimes called the lateral and medial); the posterior nares pass through the space, called the pterygoid fossa, between the processes. pterygoid process Wikipedia:Pterygoid_processes_of_the_sphenoid pterygoid process of sphenoid bone lateral structure skeletal element projection