variants: or pyro-

Definition of pyr-

1 : fire : heat pyrometer pyrheliometer
2a : produced by or as if by the action of heat pyroelectricity
b : derived from a corresponding ortho acid by loss usually of one molecule of water from two molecules of acid pyrophosphoric acid
3 : fever pyrogenic

History and Etymology for pyr-

Greek, from pyr — more at fire

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