Mid 19th century; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From predaceous, variant of predacious + -an, after crustacean, etc.
Definition of predacean in US English:
predacean
nounprɛˈdeɪʃn
rare
A predacious animal; a predator.
Origin
Mid 19th century; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From predaceous, variant of predacious + -an, after crustacean, etc.