- Types:
- show 36 types...
- hide 36 types...
-
pocket
an opening at the corner or on the side of a billiard table into which billiard balls are struck
-
diastema
a gap or vacant space between two teeth
-
Ranvier's nodes, nodes of Ranvier
small gaps in the myelin sheath of medullated axons
-
foramen, hiatus
a natural opening or perforation through a bone or a membranous structure
-
breach
an opening (especially a gap in a dike or fortification)
-
chasm
a deep opening in the earth's surface
-
cleft, crack, crevice, fissure, scissure
a long narrow opening
-
hole
an opening into or through something
-
mouth
an opening that resembles a mouth (as of a cave or a gorge)
-
rift
a gap between cloud masses
-
rent, rip, snag, split, tear
an opening made forcibly as by pulling apart
-
window
an opening that resembles a window in appearance or function
-
corner pocket
a pocket at the corner of a billiard table
-
side pocket
a pocket on the side of a billiard table
-
Monro's foramen, foramen of Monro, interventricular foramen
the small opening (on both the right and left sides) that connects the third ventricle in the diencephalon with the lateral ventricle in the cerebral hemisphere
-
foramen magnum
the large opening at the base of the cranium through which the spinal cord passes
-
abysm, abyss
a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively)
-
aperture
a natural opening in something
-
bolt-hole
a hole through which an animal may bolt when pursued into its burrow or den
-
bullet hole
a hole made by a bullet passing through it
-
chap
a crack in a lip caused usually by cold
-
chink
a narrow opening as e.g. between planks in a wall
-
cranny
a small opening or crevice (especially in a rock face or wall)
-
crevasse
a deep fissure
-
fatigue crack
a crack in metal resulting from metal fatigue
-
break, fault, faulting, fracture, geological fault, shift
(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
-
gulf
a deep wide chasm
-
leak
an accidental hole that allows something (fluid or light etc.) to enter or escape
-
ozone hole
an area of the ozone layer (near the poles) that is seasonally depleted of ozone
-
perforation
a hole made in something
-
rathole
a hole (as in the wall of a building) made by rats
-
rift
a narrow fissure in rock
-
slit
a narrow fissure
-
split
a lengthwise crack in wood
-
vent, volcano
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
-
knothole
a hole in a board where a knot came out