Meaning & Definition of word "Lumen"
to
Lumen
/ˈluː.mən/
noun:
- 1. A unit of luminous flux in the International System of Units (SI), equal to the amount of light emitted per second in a unit solid angle by a uniform source of light of one candela.
- Example: The new LED bulb emits 800 lumens, making it suitable for brightening the entire room.
- 2. The inside space of a tubular structure, such as a blood vessel or a perforated organ.
- Example: The lumen of the artery was narrowed due to the buildup of plaque.
- 3. A measure of the amount of light that is perceived by the human eye.
- Example: The experiment measured the lumens produced by various light sources.
Etymology
From Latin lumen, meaning 'light' or 'glow.'
Common Phrases and Expressions
lumen per watt:
A measure of the efficiency of a light source.
in the lumen:
Referring to being well-lit or illuminated.
Related Words
luminous:
Emitting or reflecting light; glowing.
luminance:
The intensity of light emitted from a surface per unit area.
Slang Meanings of lumen
Meaning: A casual term for a bright light source.
Example Sentence: That new LED bulb is a total lumen bomb!
Meaning: Used informally to refer to something that is extremely bright or eye-catching.
Example Sentence: That car's headlights are lumen city; they light up the whole road!