| Pyr | a thermometer designed to measure high temperatures |
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| Pyr | a pyrometer consisting of a series of cones that melt at different temperatures |
| Pyr | a mineral consisting of lead chloride and phosphate |
| Pyr | a deep red garnet used as a gemstone |
| Pyr | a morbid fear of fire |
| Pyr | an alloy that emits sparks when struck or scratched with steel |
| Pyr | tropical click beetles |
| Pyr | tropical American click beetle having bright luminous spots |
| Pyr | a salt or ester of pyrophosphoric acid |
| Pyr | a solid acid formed by reactions of orthophosphoric acid |
| Pyr | a white or greenish aluminum silicate mineral (resembles talc) |
| Pyr | a pyrometer that uses the color of the light emitted by a hot object |