Index of English words, starting with "op"

(1) - Opalescent (a.) Reflecting a milky or pearly light from the interior; having an opaline play of colors.

(1) - Opaline (a.) Of, pertaining to, or like, opal in appearance; having changeable colors like those of the opal.

(1) - Opaque (n.) That which is opaque; opacity.
(2) - Opaque (a.) Obscure; not clear; unintelligible.
(3) - Opaque (a.) Impervious to the rays of light; not transparent; as, an opaque substance.

(1) - Opaqueness (n.) The state or quality of being impervious to light; opacity.