‖n.; pl.Cheliceræ [ NL., fr. Gr. chhlh` claw + ke`ras horn. ] (Zool.) One of the anterior pair of mouth organs, terminated by a pincherlike claw, in scorpions and allied Arachnida. They are homologous with the falcers of spiders, and probably with the mandibles of insects. [ 1913 Webster ]