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Measures and Units


This resource provides clear definitions of all the units, prefixes and styles of the Système International (SI), as well as traditional and industry-specific units. The terms are taken from a broad range of subjects including astronomy, electromagnetics, geology, photography, mathematics, meteorology, physics, and temperature.
On this page: L to lx.

Title Index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
L:  A

L (volume, fundamental constant, luminance)
latitude (measure)
lb (mass)
league (history, Christianity, France)
lentor (rheology)
leo (acceleration)
letter size (paper and printing)
light watt (optics)
light-nanosecond (astronomy)
light-picosecond (astronomy)
light-second (astronomy)
light-year (unit, measure)
line (top)
line of induction (magnetic flux)
livermore loops (informatics)
livestock unit (agriculture)
logarithm (in mathematics)
Lorentz unit (spectroscopy)
Loschmidt constant (fundamental constant)
loudness unit (acoustics)
lumerg (optics)
Lundquist number (rheology)
lunour (time)
lusec (physics)
lx (photics)