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Definitions of breastbone
  1. noun
    the flat bone that articulates with the clavicles and the first seven pairs of ribs

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Definition that contains breastbone
  • keel the median ridge on the breastbone of birds that fly
  • carina any of various keel-shaped structures or ridges such as that on the breastbone of a bird or that formed by the fused petals of a pea blossom
  • gladiolus the large central part of the breastbone
  • manubrium the upper part of the breastbone
  • mononychus olecranus a turkey-sized long-legged fossil 75 million years old found in the Gobi Desert having bird-like fused wrist bones and keeled breastbone and a long tail resembling a dinosaur's; short forelimbs end in a single claw instead of wings; classification as bird or dinosaur is in dispute
  • corpus sternum the large central part of the breastbone
  • chicken-breasted having a chest deformity marked by a projecting breastbone caused by infantile rickets
  • protoavis most primitive avian type known; extinct bird of the Triassic having bird-like jaw and hollow limbs and breastbone with dinosaur-like tail and hind limbs
  • ratite flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
  • carinate birds having keeled breastbones for attachment of flight muscles
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