| PYROPHONE | • pyrophone n. (Music) a musical instrument in which the sound is produced by flames of gas in tubes of different length. • PYROPHONE n. an organ producing interference-tones by pairs of flames in tubes. |
| PYROPHOBIA | • pyrophobia n. An fear or hatred of fire or flames. • PYROPHOBIA n. fear of fire. |
| PYROPHOBIC | • pyrophobic adj. Suffering from pyrophobia; afraid of fire. • pyrophobic n. A person who is afraid of fire. • PYROPHOBIC n. one having an irrational fear of fires. |
| PYROPHONES | • pyrophones n. Plural of pyrophone. • PYROPHONE n. an organ producing interference-tones by pairs of flames in tubes. |
| PYROPHORIC | • pyrophoric adj. Spontaneously igniting in air, especially when in a finely divided state. • pyrophoric adj. Producing sparks, especially by friction. • pyrophoric adj. (Fire investigation) Able to oxidize with exposure to atmospheric oxygen at normal temperatures. |
| PYROPHORUS | • pyrophorus n. A substance capable of taking fire spontaneously on exposure to the air, especially in a finely divided state. • Pyrophorus prop.n. A taxonomic genus within the family Elateridae – fire beetles, bioluminescent click beetles. • PYROPHORUS n. any substance capable of igniting spontaneously on exposure to air. |
| PYROPHOBIAS | • PYROPHOBIA n. fear of fire. |
| PYROPHOBICS | • pyrophobics n. Plural of pyrophobic. • PYROPHOBIC n. one having an irrational fear of fires. |
| PYROPHOROUS | • pyrophorous adj. (Archaic) light-producing. • pyrophorous adj. (Archaic) of or relating to pyrophorus. • PYROPHOROUS adj. spontaneously igniting in air, also PYROPHORIC. |
| PYROPHORUSES | • PYROPHORUS n. any substance capable of igniting spontaneously on exposure to air. |
| PYROPHOSPHATE | • pyrophosphate n. (Inorganic chemistry) Any salt or ester of pyrophosphoric acid. • PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid. |
| PYROPHOSPHATES | • pyrophosphates n. Plural of pyrophosphate. • PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid. |
| PYROPHOSPHORIC | • pyrophosphoric adj. Of, or relating to pyrophosphoric acid or its derivatives. • PYROPHOSPHORIC adj. as in pyrophosphoric acid, a type of acid. |
| PYROPHOTOGRAPH | • PYROPHOTOGRAPH n. a burnt-in photograph, e.g. on glass or porcelain. |
| PYROPHOTOMETER | • PYROPHOTOMETER n. a type of pyrometer in which the temperature of an incandescent body is determined by photometric measurement of the light it emits. |
| PYROPHOTOMETRY | • PYROPHOTOMETRY n. the measurement of the temperature of an incandescent body by photometric measurement of the light it emits. |
| PYROPHOTOGRAPHS | • PYROPHOTOGRAPH n. a burnt-in photograph, e.g. on glass or porcelain. |
| PYROPHOTOGRAPHY | • pyrophotography n. (Photography) Any photographic process involving the use of heat to fix the picture. • PYROPHOTOGRAPHY n. the production of pyrophotographs. |
| PYROPHOTOMETERS | • PYROPHOTOMETER n. a type of pyrometer in which the temperature of an incandescent body is determined by photometric measurement of the light it emits. |