The Collaborative International Dictionary of English v.0.48:

Modus operandi \Mo"dus op`er*an"di\[L.],
   manner of operating. Often abbreviated to MO
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

-mo \-mo\
   A suffix added to the names of certain numerals or to the
   numerals themselves, to indicate the number of leaves made by
   folding a sheet of paper; as, sixteenmo or 16mo; eighteenmo
   or 18mo. It is taken from the Latin forms similarly used; as,
   duodecimo, sextodecimo, etc. A small circle, placed after the
   number and near its top, is often used for -mo; as, 16[deg],
   18[deg], etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mo \Mo\ (m[=o]), a., adv., & n. [Written also moe.] [AS.
   m[=a]. See More.]
   More; -- usually, more in number. [Obs.]
   [1913 Webster]

         An hundred thousand mo.                  --Chaucer.
   [1913 Webster]

         Likely to find mo to commend than to imitate it.
                                                  --Fuller.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mo \Mo\, (Chem.)
   chemical symbol for the element molybdenum.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

MO \MO\,
   abbreviation for modus operandi, manner of operating; --
   often used to refer to the method an habitual criminal uses
   to perpetrate his crime.
   [PJC]

WordNet (r) 3.0 (2006):

mo
    n 1: an indefinitely short time; "wait just a moment"; "in a
         mo"; "it only takes a minute"; "in just a bit" [syn:
         moment, mo, minute, second, bit]
    2: a polyvalent metallic element that resembles chromium and
       tungsten in its properties; used to strengthen and harden
       steel [syn: molybdenum, Mo, atomic number 42]
    3: a midwestern state in central United States; a border state
       during the American Civil War, Missouri was admitted to the
       Confederacy without actually seceding from the Union [syn:
       Missouri, Show Me State, MO]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MO
       Machine Object (PO)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MO
       Management Object (OSI)


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

mo

    The country code for Macau.

   (1999-01-27)