nacreous

adjective

na·cre·ous | \ ˈnā-krē-əs

, -k(ə-)rəs\

Definition of nacreous

: possessing the qualities of, consisting of, or abounding in nacre also : iridescent

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the nacreous lining of the shell of a mollusk

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Also called polar stratospheric clouds (or less precisely, rainbow clouds), nacreous clouds normally only form in high latitudes and at extremely cold temperatures. — National Geographic, "Rare Shimmering Rainbow Clouds Appear Over the U.K.," 3 Feb. 2016 The cold air the storm blew in also led to the formation of beautiful nacreous clouds. — National Geographic, "Rare Shimmering Rainbow Clouds Appear Over the U.K.," 3 Feb. 2016

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More Definitions for nacreous

nacreous

adjective

na·cre·ous | \ ˈnā-krē-əs

, -k(ə-)rəs

: having a pearly appearance nacreous bacterial colonies