- 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
Origin of pyro-; from Classical Greek pyr (gen. pyros), fire
nounpl. py·ros Slang
- A person who has a compulsion to set fires; a pyromaniac.
- See pyrotechnics.
- Fire; heat: pyrotechnic.
- Relating to the action of fire or heat: pyrography.
- Fever: pyrogen.
- Formed upon heating, by loss of water or another small molecule: pyrosulfuric acid.
Origin of pyro-New Latin, from Greek puro-, from p&umacron;r, fire; see pa&schwa;w&rlowring; in Indo-European roots.
From Latin pyr, from Ancient Greek Ï€á¿¦Ï (pur, “fire").