MARCASITE
Etymology
Noun
marcasite (countable and uncountable, plural marcasites)
(mineral) The orthorhombic form of iron disulfide, FeS2, occurring as yellow crystals. [from 19th c.]
Synonym: white iron pyrite
(jewellery) Pyrite.
(historical) Any of various metal sulfides, usually iron sulfide minerals. [from 15th c.]
Usage notes
• Marcasite is physically and crystallographically distinct from pyrite, although the two have the same chemical composition.
Source: Wiktionary
Mar"ca*site, n. Etym: [F. marcassite; cf. It. marcassita, Sp. marquesita, Pg. marquezita; all fr. Ar. marqashitha.] (Min.)
Definition: A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites. Golden marcasite, tin. [Obs.]
Source: Webster’s Unabridged Dictionary 1913 Edition
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CATCH
(verb) grasp with the mind or develop an understanding of; “did you catch that allusion?”; “We caught something of his theory in the lecture”; “don’t catch your meaning”; “did you get it?”; “She didn’t get the joke”; “I just don’t get him”
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