1382, from O.Fr.
cocatris, altered by influence of
coq from L.L.
*calcatrix, from L.
calcare "to tread" (
calx "heel"), as translation of Gk.
ikhneumon, lit. "tracker, tracer." In classical writings, an Egyptian animal of some sort, the mortal enemy of the crocodile, which it tracks down and kills. This vague sense became hopelessly confused in the Christian West, and in England the word ended up applied to the equivalent of the
basilisk (q.v.). A serpent hatched from a cock's egg, it was fabled to kill by its glance and could only be slain by tricking it into seeing its own reflection. Belief in them persisted even among the educated because the word was used in the KJV several times to translate a Heb. word for "serpent." In heraldry, half cock, half serpent. Identified variously with the basilisk and the crocodile.