nano-

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nano-

Symbol: n. A prefix to a unit, indicating a fraction of 10–9 of that unit. For example, one nanometer (symbol: nm) is 10–9 meters.

nano-

[′nan·ō]
(biology)
A prefix meaning dwarfed.
(mathematics)
A prefix representing 10-9, which is 0.000000001 or one-billionth of the unit adjoined.

nano-

/nan'oh/ 1. <unit> A prefix meaning 10^-9 or one billionth.

Used loosely to mean "small", e.g. nanotechnology, or (rarely), following "nanosecond", to mean a short time, e.g. "I'll be with you in a nano".