Webster's New World Medical Dictionary

venous catheterization
The insertion of a tiny
tube (catheter) into a peripheral or central vein to
deliver fluids or medication. Venous catheterization
is the most frequently used method for administra-
tion of IV fluids. The most common complication of
venous catheterization is infection at the site of the
catheter (catheter sepsis).
vent
To air one’s feelings by putting problems into
words.
ventilation 1
The exchange of air between the
lungs and the atmosphere so that oxygen is
exchanged for carbon dioxide in the alveoli (the tiny
air sacs in the lungs).
2
When a person (or per-
sons) airs out their feelings by putting their prob-
lems into words.
ventilator
A machine that mechanically assists a
patient in the exchange of oxygen and carbon diox-
ide, a process sometimes referred to as artificial
respiration.
ventral
Pertaining to the front or anterior of a
structure. Something that is ventral is oriented
toward the belly, toward the front of the body. For
example, the bellybutton (umbilicus) is in the ven-
tral midline. The opposite of ventral is dorsal. See
also Appendix B, “Anatomic Orientation Terms.”
vector
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ventricle
A chamber of an organ. For example,
the four connected cavities in the central portion of
the brain are called ventricles.
ventricle, brain
See 
brain ventricle.
ventricle, cerebral
See 
cerebral ventricle.
ventricle, fourth
See 
fourth ventricle.
ventricle, heart
See 
heart ventricle.