S
serum / sulphur / son
Sa
saline
Sag
sagital
SCI
subcutaneous injection
SD
standard deviation
SE
side effect(s)
Se
sensitivity / selenium
Sec
second
SFX
side effects
sib
sibling
sig
signa (label)
SIN
see if necessary
SOB
short of breath
SOBOE
short of breath on exertion
sol
soluble
soln
solution
sp
species (singular) / specimen
Sp
specificity
spg
sponge
spp
species (plural)
SPT
skin prick test
SR
sustained release / sinus rhythm / system review / sedimentation
SRN
state registered nurse
SSTT
Saturday, Sunday, Tuesday, Thursday