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[mas-i-kot] /ˈmæs ɪˌkɒt/
monoxide of lead, PbO, in the form of a yellow powder, used as a pigment and drier.
late Middle English
1425-75; late Middle English masticot < Middle French < Italian massicotto < Arabic masḥaqūniyā, perhaps < Greek Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for massicot


a yellow earthy secondary mineral consisting of lead oxide. Formula: PbO
Word Origin
C15: via French from Italian marzacotto ointment, perhaps from Arabic shabb qubti Egyptian alum
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for massicot

one of the two forms of lead oxide (PbO) that occurs as a mineral (the other form is litharge). Massicot forms by the oxidation of galena and other lead minerals as soft, yellow, earthy or scaly masses that are very dense. It has been found in significant quantities at Badenweiler, Ger.; La Croix-aux-Mines, Fr.; the Transvaal, S.Af.; Perote, Mex.; and Leadville, Colo., U.S. For detailed physical properties, see oxide mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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