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Answer for the clue "A metric unit of length equal to one billionth of a meter ", 9 letters:
nanometre

Alternative clues for the word nanometre

Word definitions for nanometre in dictionaries

Wikipedia Word definitions in Wikipedia
The nanometre ( International spelling as used by the International Bureau of Weights and Measures ; SI symbol: nm ) or nanometer ( American spelling ) is a unit of length in the metric system , equal to one billionth of a metre ( m). The name combines ...

WordNet Word definitions in WordNet
n. a metric unit of length equal to one billionth of a meter [syn: nanometer , nm , millimicron , micromillimeter , micromillimetre ]

Wiktionary Word definitions in Wiktionary
n. An SI subunit of length equal to 10 -9 metres. Symbol: nm

Usage examples of nanometre.

That was when I got serious about my research, and found out about the Sedge Grass Support Group, and learned from them that fragments of the rhizomes only 500 nanometres long had been observed to regenerate the full plant in a single growing season.