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A light yellow, red-brown, or black mineral, SnO2, that is an important tin ore. Also called tinstone.

[French cassitérite, from Greek kassiteros, tin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Minerals) a black or brown mineral, found in igneous rocks and hydrothermal veins. It is a source of tin. Composition: tin oxide. Formula: SnO2. Crystal structure: tetragonal. Also called: tinstone
[C19: from Greek kassiteros tin]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(kəˈsɪt əˌraɪt)

a brown or black mineral, tin dioxide, SnO2, usu. found as fibrous masses or placer deposits; the chief ore of tin.
[1855–60; < Greek kassíter(os) tin + -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cassiterite - a hard heavy dark mineral that is the chief source of tin
atomic number 50, Sn, tin - a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
* Tin ore production decreased by 48.81% to 3,405 ton compared to the same period last year of 6,653 ton
THE Vice Chancellor of the University of Ilorin, Professor Sulyman Age Abdulkareem, has said that there is a large deposit of tin ore on the University land from which the University can generate huge revenue.
A four-man operation can fetch 30 kilograms of tin ore on a good day, another sea miner told.
Gaosong ore field is located in the northeastern Gejiu tin ore deposit and the northern Wuzishan anticlinorium.
As I write this, I'm glancing at my most valued geological specimen, given to me by my father--a chunk of tin ore mined at Geevor, not far from the long-defunct Botallack mine depicted in the feature's opening photo, that I use as a paperweight.
The country stands out with its gold, tin ore, methane and hydro-electricity power potential as well as vast arable lands suitable for farming.
Congo's Eastern borderlands have some of the world's largest deposits of tin ore and coltan, which is used in electronic devices like mobile phones and video game consoles.
It is a fact that the smelters imported a record 59,539mt of foreign tin ore in 1994 (Mining Magazine 1994: 177).
Records show that during the main production period from 1822 to 1893, metal production from this group of mines was approximately 3,900 tonnes of copper, 5,400 tonnes of lead, 400 tonnes of Cassiterite (tin ore), 37,300 ounces of silver and 5 tonnes of Wolframite (tungsten ore).
-- Tin ore production volume by the end of June 2012 was 16,839 ton sn, while ore production from last year same period was 17,701 ton sn or 5% lower.