The Collaborative International Dictionary of English v.0.48:

Comma \Com"ma\, n. [L. comma part of a sentence, comma, Gr. ?
   clause, fr. ? to cut off. Cf. Capon.]
   1. A character or point [,] marking the smallest divisions of
      a sentence, written or printed.
      [1913 Webster]

   2. (Mus.) A small interval (the difference between a major
      and minor half step), seldom used except by tuners.
      [1913 Webster]

   Comma bacillus (Physiol.), a variety of bacillus shaped
      like a comma, found in the intestines of patients
      suffering from cholera. It is considered by some as having
      a special relation to the disease; -- called also cholera
      bacillus.

   Comma butterfly (Zool.), an American butterfly (Grapta
      comma), having a white comma-shaped marking on the under
      side of the wings.
      [1913 Webster]

WordNet (r) 3.0 (2006):

comma
    n 1: a punctuation mark (,) used to indicate the separation of
         elements within the grammatical structure of a sentence
    2: anglewing butterfly with a comma-shaped mark on the underside
       of each hind wing [syn: comma, comma butterfly,
       Polygonia comma]

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "comma":
   ampersand, angle brackets, apostrophe, boundary, braces, caesura,
   colon, dash, decimal point, diagonal, dot, ellipsis,
   exclamation mark, full stop, hyphen, interval, juncture, lull,
   parens, parentheses, pause, period, point, question mark,
   quotation marks, quotes, semicolon, single quotes, solidus, stop,
   virgule



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

Comma

    COMputable MAthematics.

   An ESPRIT project at KU Nijmegen.

   (1994-11-30)


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

comma
,

    "," ASCII character 44.  Common names: ITU-T:
   comma.  Rare: ITU-T: cedilla; INTERCAL: tail.

   In the C programming language, "," is an operator which
   evaluates its first argument (which presumably has
   side-effects) and then returns the value of its second
   argument.  This is useful in "for" statements and macros.

   (1995-03-10)