gypseous
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gyp·se·ous
(jĭp′sē-əs)adj.
Of, relating to, or containing gypsum.
[From Late Latin gypseus, from Latin gypsum, gypsum; see gypsum.]
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.
gyp•se•ous
(ˈdʒɪp si əs)adj.
of or pertaining to gypsum.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.