1 entry 1 source
Millimicron
Open directlyWebster's 1828 Dictionary · 1828
Part of speech: noun (n.)
The thousandish part of a micron or the millionth part of a millimeter; -- a unit of length used in measuring light waves, etc.
1 entry 1 source
Part of speech: noun (n.)
The thousandish part of a micron or the millionth part of a millimeter; -- a unit of length used in measuring light waves, etc.