obscuration

About 0.13 uses per million words.

Meaning

1. noun The state of being obscured.
2. noun A unit of measurement used in particular for smoke detectors which respond to absorption of light by smoke, in percent absorption per unit length, e.g. % obs/ft, % obs/m.

Similar words

obstruction concealment obstructive blockage obfuscation fouling invisibility filibuster filibustering respirator

Often followed by

of and by is in or to ratio was

Word family

obscurations obscure obscured obscures obscuring