LUMEN
\lˈuːmɛn], \lˈuːmɛn], \l_ˈuː_m_ɛ_n]\
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A unit of illumination, being the amount of illumination of a unit area of spherical surface, due to a light of unit intensity placed at the center of the sphere.
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A unit of light flux, being the flux through one square meter of surface the illumination of which is uniform and of unit brightness.
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An opening, space, or cavity, esp. a tubular cavity; a vacuole.
By Oddity Software
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A unit of illumination, being the amount of illumination of a unit area of spherical surface, due to a light of unit intensity placed at the center of the sphere.
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A unit of light flux, being the flux through one square meter of surface the illumination of which is uniform and of unit brightness.
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An opening, space, or cavity, esp. a tubular cavity; a vacuole.
By Noah Webster.
By Henderson, I. F.; Henderson, W. D.
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Light, Pupil -l. Constans, Phosphorus.
By Robley Dunglison
By Willam Alexander Newman Dorland
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.