| PYROS | • pyros n. Plural of pyro. • PYRO n. (short for) pyrogallol, a chemical used in photography. |
| PYROSCOPE | • pyroscope n. (Dated, physics) An early form of pyrometer used to measure high temperatures. • PYROSCOPE n. an instrument for measuring intensity of radiant heat. |
| PYROSCOPES | • pyroscopes n. Plural of pyroscope. • PYROSCOPE n. an instrument for measuring intensity of radiant heat. |
| PYROSES | • pyroses n. Plural of pyrosis. • PYROSIS n. (Greek) heartburn. |
| PYROSIS | • pyrosis n. (Medicine) A burning sensation in the chest due to reflux of stomach contents in the esophagus. • PYROSIS n. (Greek) heartburn. |
| PYROSISES | • PYROSIS n. (Greek) heartburn. |
| PYROSOME | • pyrosome n. Any of several pelagic colonial tunicates, of the genus Pyrosoma, found in tropical waters. • PYROSOME n. a type of thermostat. |
| PYROSOMES | • pyrosomes n. Plural of pyrosome. • PYROSOME n. a type of thermostat. |
| PYROSTAT | • pyrostat n. A thermostat designed to operate at high temperatures. • pyrostat n. An automatic draught-regulator for chimney-stacks, smoke-pipes, etc. • PYROSTAT n. an automatic fire-alarm and extinguisher; a thermostat. |
| PYROSTATIC | • PYROSTATIC adj. relating to a pyrostat, a thermostat used at high temperatures. |
| PYROSTATS | • pyrostats n. Plural of pyrostat. • PYROSTAT n. an automatic fire-alarm and extinguisher; a thermostat. |
| PYROSULFITE | • pyrosulfite n. (Inorganic chemistry) metabisulfite. • PYROSULFITE n. as in sodium pyrosulfite, an inorganic compound used as a preservative, antioxidant and disinfectant. |
| PYROSULFITES | • pyrosulfites n. Plural of pyrosulfite. • PYROSULFITE n. as in sodium pyrosulfite, an inorganic compound used as a preservative, antioxidant and disinfectant. |
| PYROSULPHATE | • pyrosulphate n. (Inorganic chemistry, Britain) Alternative spelling of pyrosulfate. • PYROSULPHATE n. a salt of sulphur. |
| PYROSULPHATES | • pyrosulphates n. Plural of pyrosulphate. • PYROSULPHATE n. a salt of sulphur. |
| PYROSULPHURIC | • pyrosulphuric adj. (Britain) Alternative spelling of pyrosulfuric. • PYROSULPHURIC adj. as in pyrosulphuric acid, a type of acid. |