combining form
or pyro-
Etymology: Middle English pyro-, from Middle French pyr-, pyro-, from Late Latin, from Greek, from pyr — more at fire
1.
a. : fire : heat
pyro meter
pyr heliometer
b. : pyrogenous and
pyro magnetic
2.
a. : derivative by the action of heat ; especially : derived from the corresponding ortho acid by loss usually of one molecule of water from two molecules of acid — in names of inorganic acids
pyro phosphoric acid
— compare meta- 4c, orth- 3a
b. : due to or attributed to the action of fire or heat
pyro chlore
pyro metamorphism
also : of fiery color
pyro phanite
3. : fever : fever producing
pyro toxin
pyro gen