SI prefix
Noun
Meaning
SI prefix (plural SI prefixes)
Synonym of metric prefix
Examples
Because the next SI prefix is 1000 times larger, measurements of 10 −5 and 10 −4 seconds are typically expressed as tens or hundreds of microseconds.
For example, 1R2 indicates 1.2 Ω, and 18R indicates 18 Ω. The use of a SI prefix symbol or the letter "R" circumvents the problem that decimal separators tend to "disappear" when photocopying a printed circuit diagram.
The kilogram is the only SI base unit with an SI prefix ("kilo", symbol "k") as part of its name.
In the 1980s, as capacities of both types of devices increased, the SI prefix G, with SI meaning, was commonly applied to disk storage, while M in its binary meaning, became common for computer memory.
In addition, the official US spelling for the rarely used SI prefix for ten is deka.
Number The SI prefix for a thousand is kilo-, officially abbreviated as k—for instance, prefixed to "metre" or its abbreviation m, kilometre or km signifies a thousand metres.