secund-
second; twice [when paired with -gravida, -para; use connecting vowel ‘I’]
sem-
half
semin-
semen
sept-
septum [a wall that divides two cavities]; seven; seventh
ser-
serum
set-
bristle; seta [pl. setae]
sex-
six
sext-
six; sixth
sial-
saliva
sicc-
dry
sider-
iron
sin-
nasal sinus; sinus; cavity
sinistr-
left
sinu-
nasal sinus; sinus; cavity
sinus-
nasal sinus; sinus; cavity
sit-
food
skelet-
skeletal
sol-
sun
soma-
body
somat-
body
somn-
sleep
sperm-
semen; spermatozoa; seminal cord; seminal vesicle
spermat-
semen; spermatozoa; seminal cord; seminal vesicle
sphen-
sphenoid bone; a wedge-shaped bone