lumen
UK/'lu:min/US
GREC2
Definitions
n.
The SI unit of luminous flux (symbol: lm); also, the inner cavity of a tube or tubular organ in the body
流明（光通量单位）；（管状器官的）腔
Root Breakdown
Loanwordlumenother
=lumen
Common Collocations
- 1.[brightness/brightness] in lumens[亮度/亮度]以流明为单位
- 2.[blood vessel] lumen[血管]管腔
Example Sentences
- 1.
A standard light bulb produces about 800 lumens.
- 2.
The lumen of the blood vessel narrowed over time.