Definition of rhytidome in US English:

rhytidome

(also rhitidome)

noun

Botany
  • In a stem or root: the outer part of the bark, composed of the periderm and the layers of dead tissue exterior to this.

Origin

Mid 19th century; earliest use found in American Journal Pharmacy. From scientific Latin rhytidoma, probably from Greek ῥυτίδωμα wrinkle, in scholia (medieval Greek or earlier) on Aristophanes Plutus 1052, 1066 from ancient Greek ῥυτιδοῦν to make wrinkled, shrivel up + -μα.

Pronunciation

rhytidome

/ˈrɪtɪdəʊm/