"sac" - key terms from Wikipedia

amniotic sac
cul de sac
dural sac
egg sac
embryo sac
ink sac
lacrimal sac
le sac	des filles
lesser sac
meant that sac
pericardial sac
sac
sac	and fox
sac	crest
sac	fungi
sac	of blood
sac	planners
sac	system
spore sac
yellow sac
yolk sac