Rock lobster Meaning, Definition & Usage

  1. noun warm-water lobsters without claws; those from Australia and South Africa usually marketed as frozen tails; caught also in Florida and California
    spiny lobster; crayfish; langouste.
  2. noun large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters
    crawfish; sea crawfish; langouste; spiny lobster; crayfish.

WordNet

Definitions
  1. (Zoöl.), any one of several species of large spinose lobsters of the genera Panulirus and Palinurus. They have no large claws. Called also spiny lobster, and sea crayfish.

Webster 1913