The word "pterygospinous" (pronounced /ˌtɛrʌɡoʊˈspaɪnəs/) is a medical term that refers to the connection between the pterygoid process of the sphenoid bone and the spine. Its spelling can be a bit confusing due to the combination of the letters "pt" and "sp". These are actually two different consonant clusters, with "pt" representing a voiceless stop and "sp" representing a voiceless fricative. Knowing this can make it easier to correctly spell and pronounce this complex medical term.
Noting a process of the pterygoid plate of the sphenoid bone, Civinini's process, processus pterygospinosus.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.