The Collaborative International Dictionary of English v.0.48:

Venter \Vent"er\, n.
   One who vents; one who utters, reports, or publishes. [R.]
   --Barrow.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Venter \Vent"er\, n. [L.]
   1. (Anat.)
      (a) The belly; the abdomen; -- sometimes applied to any
          large cavity containing viscera.
      (b) The uterus, or womb.
      (c) A belly, or protuberant part; a broad surface; as, the
          venter of a muscle; the venter, or anterior surface,
          of the scapula.
          [1913 Webster]

   2. (Zool.) The lower part of the abdomen in insects.
      [1913 Webster]

   3. (Rom. & O. E. Law) A pregnant woman; a mother; as, A has a
      son B by one venter, and a daughter C by another venter;
      children by different venters.
      [1913 Webster]

WordNet (r) 3.0 (2006):

venter
    n 1: a speaker who expresses or gives vent to a personal opinion
         or grievance
    2: the region of the body of a vertebrate between the thorax and
       the pelvis [syn: abdomen, venter, stomach, belly]
    3: the womb; "`in venter' is legal terminology for `conceived
       but not yet born'"
    4: a bulging body part (as the belly of a muscle)

Bouvier's Law Dictionary, Revised 6th Ed (1856):

VENTER or VENTRE. Signifies literally the belly. In law it is used
figuratively for the wife: for example, a man has three children by the
first, and one by the second venter.
     2. A child is said to be in ventre sa mere before it is born; while it
is a foetus.