pyrophosphorous

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• pyro- — 1. a combining form meaning fire, heat, high temperature, used in the formation of compound words: pyrogen; pyrolusite; pyromancy. 2. Chem. a combining form used in the names of inorganic acids, indicating that the acid s water content is… …   Universalium

• pyro- — a word element used: 1. Chemistry a. before the name of an inorganic acid, indicating that its water content is intermediate between that of the corresponding ortho (more water) and meta (least water) acids, as in pyroantimonic acid, H4Sb2O7,… …