Mother Carey's chicken Meaning, Definition & Usage

  1. noun medium-sized storm petrel
    Mother Carey's hen; Oceanites oceanicus.

WordNet

Definitions
  1. (Zoöl.), any one of several species of small petrels, as the stormy petrel (Procellaria pelagica), and Leach's petrel (Oceanodroma leucorhoa), both of the Atlantic, and O. furcata of the North Pacific.

Webster 1913