Definition of pergamentaceous in US English:

pergamentaceous

adjective

Biology Botany
  • Of the nature or texture of parchment.

Origin

Mid 19th century; earliest use found in Todd's Cyclopaedia of Anatomy and Physiology. From post-classical Latin pergamentum parchment + -aceous.

Pronunciation

pergamentaceous

/ˌpəːɡəmənˈteɪʃəs/