What does "basilisk" mean?

Basilisk: (Zoöl.) A lizard of the genus Basiliscus, belonging to the family Iguanidæ. Note: This genus is remarkable for a membranous bag rising above the occiput, which can be filled with air at pleasure; also for an elevated crest along the back, that can be raised or depressed at will.

Additional senses

  1. 2.(Mil.) A large piece of ordnance, so called from its supposed resemblance to the serpent of that name, or from its size. [Obs.]

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