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opacus
American
[oh-pay-kuhs]
/ oʊˈpeɪ kəs /
adjective
Meteorology.
Etymology
Origin of opacus
1615–25; < New Latin, Latin opācus; see opaque
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
