Webster's New World Medical Dictionary

sudden infant death syndrome
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cause for superior vena cava syndrome, which often
requires X-ray imaging, computerized axial tomog-
raphy (CAT), or magnetic resonance imaging (MRI)
scanning. Treatment is directed toward the underly-
ing cause. See also 
vena cava, superior.
supernumerary
Beyond the normal number,
extra. For example, a supernumerary chromosome
is an extra one beyond the usual number of 46, and
a supernumerary digit is an extra finger or toe.
supernumerary digit
See 
digit, supernumerary.
supernumerary nipple
See 
nipple, supernu-
merary.
supernumerary placenta
See 
placenta,
accessory.
supertaster
A person who has an unusually large
density of taste buds, each surrounded by pain fibers.
As a result, the person has an exquisite ability to taste
accurately.
supination
Rotation of the arm or leg outward.
In the case of supination of the arm, the palm of the
hand faces forward.
supinator foot type
A type of foot that restricts
the impact of the stride largely to the outer edges of
the foot. This type of foot often has a very high, rigid
arch.
supine
With the back or dorsal surface down-
ward; lying face up, as opposed to prone. See also
Appendix B, “Anatomic Orientation Terms.”
supportive care
Treatment given to prevent,
control, or relieve complications and side effects
and to improve the patient’s comfort and quality of
life.
suppressant, cough
See 
cough suppressant.