Definition of rain-fowl in US English:

rain-fowl

noun

  • 1English regional (northern) in later use. Now rare (perhaps historical). A woodpecker; especially the green woodpecker, Picus viridis.

  • 2Any of several cuckoos (family Cuculidae). Compare "rainbird". Now rare.

Origin

Late Middle English; earliest use found in Promptorium Parvulorum. From rain + fowl.

Pronunciation

rain-fowl

/ˈreɪnfaʊl/