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pearlite 珍珠體; 珍珠巖; 珠光體 珍珠體; 珍珠岩; 珠光體 pearlite n 1: a lamellar mixture of cementite and ferrite formed during the cooling of austenite; a constituent of steel and cast iron Pearlite \Pearl"ite\, Pearlstone \Pearl"stone`\, n. (Min.)
A glassy volcanic rock of a grayish color and pearly luster, often having a spherulitic concretionary structure due to the curved cracks produced by contraction in cooling. See Illust. under {Perlitic}. [1913 Webster]
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