noun, plural o·pac·i·ties.
Origin of opacity
Examples from the Web for opacity
Historical Examples of opacity
The cause of this opacity is generally quick boiling while the meat is in.Culture and Cooking
Sometimes the want of opacity is due to the fact that the developer was too cold.
They have not substance enough, in fact, to reach a state of opacity.The Ocean World:
The opacity is remarkably high, explaining why the star is so nearly "heat-tight."Astronomy
The amount of acid regulates the density or opacity of the enamel.
noun plural -ties
1550s, "darkness of meaning, obscurity," from French opacité, from Latin opacitatem (nominative opacitas) "shade, shadiness," from opacus "shaded, dark, opaque" (see opaque). The literal sense "condition of being impervious to light" first recorded 1630s.