astacus Meaning, Definition & Usage

  1. noun type genus of the family Astacidae; Old World crayfish
    genus Astacus.

WordNet

As"ta*cus noun
Etymology
L. astacus a crab, Gr. .
Definitions
  1. (Zoöl.) A genus of crustaceans, containing the crawfish of fresh-water lobster of Europe, and allied species of western North America. See Crawfish.

Webster 1913