opacus

[ oh-pey-kuhs ]

adjective

, Meteorology.

1. (of a cloud) dense enough to obscure the sun or moon.

Word History and Origins

Origin of opacus¹

1615–25; < New Latin, Latin opācus; opaque

Example Sentences

Opacus denotes shady, with reference to a pleasant and beneficial coolness, in opp.

From Project Gutenberg

Niger opacus lvis, clypeo emarginato, thorace postice rotundato, elytrorum lateribus humeralibus haud incisis.

From Project Gutenberg

Exscutellatus niger opacus, capite subcornuto, pedibus intermediis dilatatis et incisis.

From Project Gutenberg

The ancestral stock from which A. opacus developed in Micronesia seemingly reached the area from Melanesia.

From Project Gutenberg

The structure of its wing resembles that of A. opacus, but the primaries are more rounded.

From Project Gutenberg