pearl·ite /ˈpɝ(ə)ˌlaɪt/
珍珠體; 珍珠岩; 珠光體
Pearl·ite 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.
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pearlite
n : a lamellar mixture of cementite and ferrite formed during
the cooling of austenite; a micro-constituent of steel
and cast iron