#projection.convex_shape  any solid convex shape that juts out from something
  supertype:  #convex_shape__convexity  a shape that curves or bulges outward
  subtype:  #salient  (military) the part of the line of battle that projects closest to the enemy
  subtype:  #jag.projection  a sharp projection on an edge or surface; "he clutched a jag of the rock"
  subtype:  #bulge__bump__hump__gibbosity__gibbousness__gibbousnes__prominence__protuberance__protrusion__extrusion__excrescence  something that bulges out or is protuberant or projects from a form
     subtype:  #frontal_eminence__frontaleminence  either prominence of the frontal bone above each orbit
     subtype:  #occipital_protuberance__occipitalprotuberance  prominence on the outer surface of the occipital bone
     subtype:  #caput  a headlike protuberance on an organ or structure; "the caput humeri is the head of the humerus which fits into a cavity in the scapula"
     subtype:  #nub  a small lump or protuberance
     subtype:  #wart  any small rounded protuberance (as on certain plants or animals)
  subtype:  #spur.projection__spine  any pointed projection
  subtype:  #tail_end__tail  any projection that resembles the tail of an animal
  subtype:  #tongue.projection__knife  any long thin projection that is transient; "tongues of flame licked at the walls"; "rifles exploded quick knives of fire into the dark"

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