opacousness

noun

opacousness

noun

Etymology From opacous + -ness.

1

Obsolete Opacity.

[T]hat 'tis the flaws that produce this opacousness, may be argued from this, that particles of the same Ammel much thicker if unflaw'd will appear somewhat transparent even to the eye […].1665, Robert Hooke, Micrographia, section X:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.