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cassiterite

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n. 锡石

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锡石

WordNet (r) 3.0 (2006) (WordNet)

cassiterite
n 1: a hard heavy dark mineral that is the chief source of tin

The Collaborative International Dictionary of English v.0.48 (gcide)

Cassiterite \Cas*sit"er*ite\, n. [Gr. ? tin.] (Min.)
Native tin dioxide; tin stone; a mineral occurring in
tetragonal crystals of reddish brown color, and brilliant
adamantine luster; also massive, sometimes in compact forms
with concentric fibrous structure resembling wood ({wood
tin}), also in rolled fragments or pebbly ({Stream tin}). It
is the chief source of metallic tin. See {Black tin}, under
{Black}.
[1913 Webster]

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The American College of Obstetricians and Gynecologists is the premier professional membership organization for obstetrician–gynecologists The College’s activities include producing practice guidelines for providers and educational materials for patients, providing practice management and career support, facilitating programs and initiatives aimed at improving women’s health, and
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