Definition of rugulosity in US English:

rugulosity

noun

Zoology
  • The state of being finely corrugated or wrinkled. Also (as a count noun): a small corrugation or wrinkle; a slight roughness.

Origin

Mid 19th century; earliest use found in Annals and Magazine of Natural History. From rugulose or rugulous + -ity: see -osity.

Pronunciation

rugulosity

/ˌruːɡjʊˈlɒsɪti/