The Collaborative International Dictionary of English v.0.48:

Micro- \Mi"cro-\, Micr- \Mi"cr-\ . [Gr. mikro`s small.]
   A combining form signifying:
   (a) Small, little, trivial, slight; as, microcosm,
       microscope.
   (b) (Metric System, Elec., Mech., etc.) A millionth part of;
       as, microfarad, microohm, micrometer.
       [1913 Webster]

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

micro-
 pref.

    1. Very small; this is the root of its use as a quantifier prefix.

    2. A quantifier prefix, calling for multiplication by 10^-6 (see 
    quantifiers). Neither of these uses is peculiar to hackers, but hackers
    tend to fling them both around rather more freely than is countenanced in
    standard English. It is recorded, for example, that one CS professor used
    to characterize the standard length of his lectures as a microcentury ?
    that is, about 52.6 minutes (see also attoparsec, nanoacre, and
    especially microfortnight).

    3. Personal or human-scale ? that is, capable of being maintained or
    comprehended or manipulated by one human being. This sense is generalized
    from microcomputer, and is esp. used in contrast with macro- (the
    corresponding Greek prefix meaning ?large?).

    4. Local as opposed to global (or macro-). Thus a hacker might say that
    buying a smaller car to reduce pollution only solves a microproblem; the
    macroproblem of getting to work might be better solved by using mass
    transit, moving to within walking distance, or (best of all) telecommuting.


The Free On-line Dictionary of Computing (30 December 2018):

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)


U.S. Gazetteer Places (2000):

Micro, NC -- U.S. town in North Carolina
   Population (2000):    454
   Housing Units (2000): 225
   Land area (2000):     0.407229 sq. miles (1.054718 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.407229 sq. miles (1.054718 sq. km)
   FIPS code:            42620
   Located within:       North Carolina (NC), FIPS 37
   Location:             35.562802 N, 78.203882 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Micro, NC
    Micro