Definition of pterygostomian in US English:

pterygostomian

adjective

Zoology
  • = pterygostomial.

Origin

Mid 19th century; earliest use found in Todd's Cyclopaedia of Anatomy and Physiology. From pterygo- + -stome + -ian Compare later pterygostome.

Pronunciation

pterygostomian

/ˌtɛrɪɡəˈstəʊmɪən/