- malacostracan Zoology
- malacostracan Zoology [ˌmalə'kɒstrək(ə)n]noun a crustacean of the large class Malacostraca, which includes crabs, shrimps, and lobsters, distinguished by having compound eyes that are typically on stalks.adjective relating to malacostracans.Originfrom mod. L. Malacostraca, from malaco- + Gk ostrakon 'shell'.
English new terms dictionary. 2014.