Webster's 1828 Dictionary
CRUCIAN
n.A short, thick, broad fish, of a deep yellow color.
Webster's 1913 Dictionary
CRUCIAN CARP
Cru "cian carp ` (-shan krp `). Etym: [Cf. Sw. karussa, G. karausche, F.carousse, -assin, corassin, LL. coracinus, Gr. (Zoöl.)
Defn: A kind of European carp (Carasius vulgaris ), inferior to the common carp; -- called also German carp.
Note: The gibel or Prussian carp is now generally considered a variety of the crucian carp, or perhaps a hybrid between it and the common carp.
New American Oxford Dictionary
crucian
cru cian |ˈkro͞oSHən ˈkruʃən |(also crucian carp ) ▶noun a small olive-green to reddish-brown European carp of still or slow-moving waters, important as a farmed fish in eastern Europe. [Carassius carassius, family Cyprinidae. ] ORIGIN mid 18th cent.: from Low German karusse, karutze, perhaps based on Latin coracinus, from Greek korax ‘raven, ’ also denoting a black fish found in the Nile.
Oxford Dictionary
crucian
crucian |ˈkruːʃ (ə )n |(also crucian carp ) ▶noun a small olive-green to reddish-brown European carp of still or slow-moving waters, important as a farmed fish in eastern Europe. ●Carassius carassius, family Cyprinidae. ORIGIN mid 18th cent.: from Low German karusse, karutze, perhaps based on Latin coracinus, from Greek korax ‘raven ’, also denoting a black fish found in the Nile.
The Wordsmith Dictionary