#space.amorphous_shape  an empty area (usually bounded in some way between things); "the architect left space in front of the building"; "they stopped at an open space in the jungle"; "the space between his teeth"
  supertype:  #amorphous_shape__amorphousshape  an ill-defined or arbitrary shape
  subtype:  #pleural_space__pleuralspace  the small potential space between the parietal and visceral layers of the pleura
  subtype:  #subarachnoid_space  a space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid
  subtype:  #opening.space__gap  an open or empty space in or between things; "there was a small opening between the trees"; "the explosion made a gap in the wall"
     subtype:  #Ranvier's_nodes__nodes_of_Ranvier  small gaps in the myelin sheath of medullated axons
     subtype:  #foramen__hiatus  a natural opening or perforation through a bone or a membranous structure
        subtype:  #interventricular_foramen__foramen_of_Monro__Monro's_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
        subtype:  #foramen_magnum__foramenmagnum  the large opening at the base of the cranium through which the spinal cord passes
     subtype:  #breach.opening  an opening (especially a gap in a dike or fortification)
     subtype:  #chasm  a deep opening in the earth's surface
        subtype:  #abyss__abys  a bottomless gulf or pit
        subtype:  #gulf.chasm  a deep wide chasm
     subtype:  #scissure__crack__cleft__crevice__fissure  a long narrow opening
        subtype:  #chap.scissure  a crack in a lip caused usually by cold
        subtype:  #chink  a narrow opening as e.g. between planks in a wall
        subtype:  #crevasse  a deep fissure
        subtype:  #fatigue_crack__fatiguecrack  a crack in metal resulting from metal fatigue
        subtype:  #geological_fault__fault__shift__fracture__break  (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geological fault"
           subtype:  #Denali_Fault  a major open geological fault in Alaska
           subtype:  #inclined_fault  a geological fault in which one side is above the other
              subtype:  #normal_fault__gravity_fault__common_fault  an inclined fault in which the hanging wall appears to have slipped downward relative to the footwall
              subtype:  #thrust_fault__overthrust_fault__reverse_fault__reversefault  a geological fault in which the upper side appears to have been pushed upward by compression
           subtype:  #strike-slip_fault  a geological fault in which one of the adjacent surfaces appears to have moved horizontally
           instance:  #San_Andreas_Fault
        subtype:  #rift.scissure  a narrow fissure in rock
        subtype:  #slit.scissure  a narrow fissure
        subtype:  #split.scissure  a lengthwise crack in wood; "he inserted the wedge into a split in the log"
        subtype:  #vent.scissure__volcano  a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
        subtype:  #volcanic_crater__crater  a bowl-shaped opening at the top of a volcano
           subtype:  #caldera  a large crater caused by the violent explosion of a volcano that collapses into a depression
           subtype:  #maar  a flat-bottomed volcanic crater that was formed by an explosion; often filled with water
     subtype:  #hole.opening  an opening into or through something
        subtype:  #aperture.hole  an opening in something
           subtype:  #pupil  contractile aperture in the iris of the eye
           subtype:  #micropyle  minute opening in the wall of an ovule through which the pollen tube enters
           subtype:  #stoma.aperture__pore  a minute epidermal pore in a leaf or stem
        subtype:  #bolt-hole  a hole through which an animal may bolt when pursued into its burrow or den
        subtype:  #bullet_hole  a hole made by a bullet passing through it
        subtype:  #cranny  a small opening or crevice (especially in a rock face or wall)
        subtype:  #leak.hole  an accidental hole that allows something (fluid or light etc.) to enter or escape; "one of the tires developed a leak"
        subtype:  #ozone_hole__ozonehole  an area of the ozone layer (near the poles) that is seasonally depleted of ozone
        subtype:  #perforation.hole  a hole made in something; "a perforation of the eardrum"
        subtype:  #rathole  a hole (as in the wall of a building) made by rats
        subtype:  #knothole  a hole in a board where a knot came out
     subtype:  #mouth-like_space_opening__mouth  an opening that resembles a mouth (as of a cave or a gorge); "he rode into the mouth of the canyon"; "they built a fire at the mouth of the cave"
     subtype:  #rift  a gap between cloud masses; "the sun shone through a rift in the clouds"
     subtype:  #rip__rent__split__tear  an opening made forcibly as by pulling apart; "there was a rip in his pants"
     subtype:  #window.opening  an opening that resembles a window in appearance or function; "he could see them through a window in the trees"
  subtype:  #swath  the space created by the swing of a scythe or the cut of a mowing machine
  subtype:  #void__vacancy__emptines  an empty area or space; "the huge desert voids"; "the emptiness of outer space"
  subtype:  #hole.space  an unoccupied space
     subtype:  #pore  any tiny hole admitting passage of a liquid (fluid or gas)
  subtype:  #enclosed_space__cavity  space that is surrounded by something
     subtype:  #hollow  a cavity or space in something; "hunger had caused the hollows in their cheeks"
     subtype:  #pouch.enclosed_space__sac__sack__pocket  an enclosed space

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