The Collaborative International Dictionary of English v.0.48:
Cuckoo \Cuck"oo\ (k[oo^]k"[=oo]), n. [OE. coccou, cukkow, F.
coucou, prob. of imitative origin; cf. L. cuculus, Gr. ????,
Skr. k?ki?a, G. kuckuk, D. koekoek.] (Zool.)
A bird belonging to Cuculus, Coccyzus, and several allied
genera, of many species.
Note: The European cuckoo (Cuculus canorus) builds no nest
of its own, but lays its eggs in the nests of other
birds, to be hatched by them. The American
yellow-billed cuckoo (Coccyzus Americanus) and the
black-billed cuckoo (Coccyzus erythrophthalmus) build
their own nests.
Cuckoo clock, a clock so constructed that at the time for
striking it gives forth sounds resembling the cry of the
Cuckoo dove (Zool.), a long-tailed pigeon of the genus
Macropygia. Many species inhabit the East Indies.
Cuckoo fish (Zool.), the European red gurnard (Trigla
cuculus). The name probably alludes to the sound that it
Cuckoo falcon (Zool.), any falcon of the genus Baza. The
genus inhabits Africa and the East Indies.
Cuckoo maid (Zool.), the wryneck; -- called also cuckoo
Cuckoo ray (Zool.), a British ray (Raia miraletus).
Cuckoo spit, or Cuckoo spittle.
(a) A frothy secretion found upon plants, exuded by the
larvae of certain insects, for concealment; -- called
also toad spittle and frog spit.
(b) (Zool.) A small hemipterous insect, the larva of which,
living on grass and the leaves of plants, exudes this
secretion. The insects belong to Aphrophora,
Helochara, and allied genera.
Ground cuckoo, the chaparral cock.