Definition of pterylography in English:

pterylography

Pronunciation /ˌtɛrɪˈlɒɡrəfi/

noun

Ornithology
  • The scientific description of the disposition and arrangement of the feathers of birds; a treatise on this.

Origin

Mid 19th century; earliest use found in untitled. From German Pterylographie from post-classical Latin pterylographia from pteryla + -graphia.