noun
An animal that drinks the blood of others, especially by sucking blood through a puncture wound; a hemovore.
(by extension) Any parasite.
(informal, derogatory) Any mosquito, gnat, midge, or other small bug which consumes human blood.
(figurative, derogatory) One who attempts to take as much from others as possible; a leech.
A vampire.
The changeable lizard (Calotes versicolor).