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[pahy-roh-bi-too-muh n, -tyoo-, -bich-oo-] /ˌpaɪ roʊ bɪˈtu mən, -ˈtyu-, -ˈbɪtʃ ʊ-/

any of the dark, solid hydrocarbons including peat, coal, and bituminous shale.


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    [pahy-ruh-sel-yuh-lohs] /ˌpaɪ rəˈsɛl yəˌloʊs/ noun 1. .

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    [pahy-ruh-kem-i-kuh l] /ˌpaɪ rəˈkɛm ɪ kəl/ adjective 1. pertaining to or producing change at high temperatures. /ˌpaɪrəʊˈkɛmɪkəl/ adjective 1. of, concerned with, being, producing, or resulting from chemical changes at high temperatures pyrochemical (pī’rō-kěm’ĭ-kəl) Relating to or designating chemical activity at elevated temperatures. Pyrochemical reactions are used, for example, to bring about the transmutation of […]

  • Pyrochlore

    [pahy-ruh-klawr, -klohr] /ˈpaɪ rəˌklɔr, -ˌkloʊr/ noun 1. a mineral, chiefly composed of niobates of the cerium metals, occurring in syenites in the form of brown crystals.

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