[oh-pey-kuh s] /oʊˈpeɪ kəs/
(of a cloud) dense enough to obscure the sun or moon.
[oh-puh] /ˈoʊ pə/ noun 1. a large, deep-bodied, brilliantly colored, oceanic food fish, Lampris regius. /ˈəʊpə/ noun 1. a large soft-finned deep-sea teleost fish, Lampris regius (or luna), of the Atlantic and Pacific Oceans and the Mediterranean Sea, having a deep, brilliantly coloured body: family Lampridae Also called moonfish, kingfish
n. 1852, from French opafication; see opacity + -fication.
[oh-puh l] /ˈoʊ pəl/ noun 1. a mineral, an amorphous form of silica, SiO 2 with some water of hydration, found in many varieties and colors, including a form that is milky white. 2. an iridescent variety of this that is used as a gem. 3. a gem of this. [oh-puh l] /ˈoʊ pəl/ noun […]
[oh-puh-les] /ˌoʊ pəˈlɛs/ verb (used without object), opalesced, opalescing. 1. to exhibit a play of colors like that of the opal. /ˌəʊpəˈlɛs/ verb 1. (intransitive) to exhibit a milky iridescence