Definition of pulverescence in US English:

pulverescence

noun

Botany
rare
  • Powderiness; a tendency to powderiness.

Origin

Early 19th century; earliest use found in Robert Kaye Greville (1794–1866), botanist. From pulverescent: see -ence.

Pronunciation

pulverescence

/ˌpʌlvəˈrɛsns/