The Collaborative International Dictionary of English v.0.48:
a. & n. from Whoop, v. t.
Whooping cough (Med.), a violent, convulsive cough,
returning at longer or shorter intervals, and consisting
of several expirations, followed by a sonorous
inspiration, or whoop; chin cough; hooping cough.
Whooping crane (Zool.), a North American crane (Crus
Americana) noted for the loud, whooplike note which it
Whooping swan (Zool.), the whooper swan. See the Note under