Cockatrice1. (n.) A fabulous serpent whose breath and look were said to be fatal. See Basilisk.
2. (n.) A representation of this serpent. It has the head, wings, and legs of a bird, and tail of a serpent.
3. (n.) A venomous serpent which cannot now be identified.
4. (n.) Any venomous or deadly thing.
Thesaurus Entries
Benedict Arnold, Brutus, Judas, Judas Iscariot, Quisling, achievement, alerion, animal charge, annulet, archtraitor, argent, armorial bearings, armory, arms, azure, bandeau, bar, bar sinister, baton, bearings, bend, bend sinister, betrayer, billet, blazon, blazonry, bordure, broad arrow, cadency mark, canton, chaplet, charge, chevron, chief, coat of arms, conniver, conspirator, conspirer, coronet, crescent, crest, cross, cross moline, crown, device, difference, differencing, double agent, double-crosser, double-dealer, eagle, ermine, ermines, erminites, erminois, escutcheon, falcon, fess, fess point, field, file, flanch, fleur-de-lis, fret, fur, fusil, garland, griffin, gules, gyron, hatchment, helmet, heraldic device, honor point, impalement, impaling, inescutcheon, informer, intrigant, intriguer, label, lion, lozenge, machinator, mantling, marshaling, martlet, mascle, metal, motto, mullet, nombril point, octofoil, or, ordinary, orle, pale, paly, pean, pheon, plotter, purpure, quarter, quartering, quisling, rat, rose, sable, saltire, schemer, scutcheon, serpent, shield, snake, spread eagle, subordinary, tenne, timeserver, tincture, torse, traitor, treasonist, tressure, trimmer, turncoat, unicorn, vair, vert, wreath, yale