orifice
noun
[ ˈɒrɪfɪs ]
• an opening, particularly one in the body such as a nostril or the anus.
Similar:
opening,
hole,
aperture,
crack,
slot,
slit,
cleft,
cranny,
chink,
gap,
space,
vent,
breach,
break,
rent,
fissure,
mouth,
crevice,
rift,
perforation,
pore,
Origin:
late Middle English: from French, from late Latin orificium, from os, or- ‘mouth’ + facere ‘make’.