"Nm" redirects here. For the U.S. state shortened to "NM", seeNew Mexico.
Thenanometre (symbol:nm) is aunit used tomeasurelength in themetric system. It is equal to onebillionth of ametre (1 m / 1,000,000,000) and forkilometre, it is equal to onetrillionth of a kilometre (1 km / 1,000,000,000,000). The name combines theSI prefixnano- (from theAncient Greekνάνος,nanos, "dwarf") with the parent unit namemetre (from Greekμέτρον,[metrοn]Error: {{Lang}}: Non-latn text (pos 5: ο)/Latn script subtag mismatch (help), "unit of measurement"). It can be written inscientific notation as 1×10−9 m.
The nanometre was formerly called themillimicrometre (or themillimicron). This is because it is 1/1000 of amicrometre, and was written with the symbolmµ (or sometimesµµ).[2][3][4]
↑Svedberg, The; Nichols, J. Burton (1923). "Determination of the size and distribution of size of particle by centrifugal methods".Journal of the American Chemical Society.45 (12):2910–2917.doi:10.1021/ja01665a016.
↑Sweden, The; Rinde, Herman (1924). "The ulta-centrifuge, a new instrument for the determination of size and distribution of size of particle in amicroscopic colloids".Journal of the American Chemical Society.46 (12):2677–2693.doi:10.1021/ja01677a011.
↑Terzaghi, Karl (1925).Erdbaumechanik auf bodenphysikalischer Grundelage. Vienna: Franz Deuticke. p. 32.
