Definition of deciduity in English:

deciduity

noun

Botany
rare
  • The state of being deciduous; deciduousness.

Origin

Early 19th century; earliest use found in Patrick Keith (1769–1840). From post-classical Latin deciduitas tendency to decline from classical Latin dēciduus tending to fall, falling + -tās.

Pronunciation

deciduity

/dɛsɪˈdjuːɪti//dɛsɪˈdʒuːɪti/