noun Download 🔗Share The state of being obscured. Examples : "The sudden obscuration of the sun by dark clouds made the afternoon feel like evening. " appearance condition nature Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share 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. Examples : "The fire alarm triggered when the smoke reached 4% obscuration per foot, indicating a significant amount of smoke blocking the light beam within the detector. " technical physics unit science device Chat with AIVocabulary GamePractice Reading
