(pī′rō, -rə; pir′ō, -ə)
- fire, heat: pyromania,pyrometer
- a substance derived (from a specified substance) by or as if by the action of heat: pyrogallic acid
- an inorganic acid derived from an ortho-acid, as orthophosphoric acid, by the elimination of one molecule of water from two molecules of the acid: pyrophosphoric acid
- Geol. a formation due to the action of heat: pyroxenite
< Gr pyr (gen. pyros), fire
See pyro- in American Heritage Dictionary 4
noun pl. py·ros Slang
- A person who has a compulsion to set fires; a pyromaniac.
- A display of pyrotechnics.
or pyr- prefix
- Fire; heat: pyrotechnic.
- Relating to the action of fire or heat: pyrography.
- Fever: pyrogen.
- Derived from an acid by the loss of a water molecule: pyrosulfuric acid.
Origin: New Latin
Origin: , from Greek puro-
Origin: , from pūr, fire; see paəwṛ in Indo-European roots
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