[pahy-ruh-loo-sahyt, pahy-rol-yuh-sahyt] /ˌpaɪ rəˈlu saɪt, paɪˈrɒl yəˌsaɪt/
a common mineral, manganese dioxide, MnO 2 , the principal ore of manganese, used in various manufactures, as a decolorizer of brown or green tints in glass, and as a depolarizer in dry-cell batteries.
a blackish fibrous or soft powdery mineral consisting of manganese dioxide in tetragonal crystalline form. It occurs in association with other manganese ores and is an important source of manganese. Formula: MnO2
“manganese dioxide,” 1828, the name given in Roman times, when it was used, in a heated state, to de-colorize glass, from Greek elements pyro- “by heat, by fire” (see pyro-) + lysis “a loosening” (see lose).
[pahy-ruh-lahyz] /ˈpaɪ rəˌlaɪz/ verb (used with object), pyrolized, pyrolizing. Chemistry. 1. to subject (a substance) to pyrolysis. /ˈpaɪrəʊˌlaɪz/ verb 1. (transitive) to subject to pyrolysis
[pahy-rol-uh-sis] /paɪˈrɒl ə sɪs/ noun, Chemistry. 1. the subjection of organic compounds to very high temperatures. 2. the resulting decomposition. /paɪˈrɒlɪsɪs/ noun 1. the application of heat to chemical compounds in order to cause decomposition 2. chemical decomposition of compounds caused by high temperatures n. 1879, from pyro- + -lysis. Related: Pyrolytic. pyrolysis py·rol·y·sis (pī-rŏl’ĭ-sĭs) […]
[pahy-ruh-lahyz] /ˈpaɪ rəˌlaɪz/ verb (used with object), pyrolized, pyrolizing. Chemistry. 1. to subject (a substance) to pyrolysis.
[pahy-roh-mag-net-ik] /ˌpaɪ roʊ mægˈnɛt ɪk/ adjective, Physics. 1. (formerly) (def 1). /ˌpaɪrəʊmæɡˈnɛtɪk/ adjective 1. a former term for thermomagnetic