The Collaborative International Dictionary of English v.0.48:

Kilo \Ki"lo\, n.; pl. Kilos. [F.]
   An abbreviation of Kilogram.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Kilo- \Kil"o-\pref. [F. kilo-. See Kilogram.]
   A combining form used to signify thousand in forming the
   names of units of measurement; as, kilogram, kilometer,
   kilowatt, etc.
   [Webster 1913 Suppl.] Kilogram

The Free On-line Dictionary of Computing (19 January 2023):

prefix
atto-
exa-
femto-
giga-
kilo-
mega-
micro-
milli-
peta-
pico-
tera-
yocto-
yotta-
zepto
zetta-

   1.  An SI prefix used to multiply the value of an SI
   (Système International) unit by some power of ten.

   2.  In mathematics or programming, a
   prefix operator is one that is written before its operand.  In
   a programming language using prefix notation, all operators
   are prefix operators.

   (2014-07-08)


The Jargon File (version 4.4.7, 29 Dec 2003):

kilo-
 pref.

    [SI] See quantifiers.