Definition of frontal bone in English:

frontal bone

Line breaks: front¦al bone


  • 1The bone which forms the front part of the skull and the upper part of the eye sockets.
    More example sentences
    • Unanimous skeletal features are few, but include a lack of contact between the squamosal and parietal bones in the skull and the presence of the frontal bone in forming the orbit.
    • Here we present a case of solitary plasmacytoma of frontal bone that was entirely asymptomatic.
    • A small vertical midline plate, termed the nasal spine of the frontal bone, contributes to the nasal septum.
  • 1.1Either of the pair of bones from which the frontal bone is formed by fusion in infancy.
    More example sentences
    • Like tetrapods, but unlike all other fishes, they also have frontal bones in the skull roof.
    • In the individual with horns, the upper layer forming the horns can be separated from what appears to be the underlying normal frontal bones without obvious damage to either element.
    • Head lateral views showed focal increased uptake at both frontal bones and vertical enlargement of the diploe and mandibular bones.

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