| articular tubercle of temporal bone | Articular eminence of the temporal bone which bounds the mandibular fossa anteriorly; it forms the anterior root of the zygomatic process; it is enclosed by the articular capsule of the temporomandibular joint with the articular fossa; the head of the mandible (and intervening articular disc) move onto the articular tubercle to allow full depression of mandible (opening of mouth). Synonym: tuberculum articulare ossis temporalis, articular eminence of temporal bone, eminentia articularis ossis temporalis, tuber zygomaticum. (05 Mar 2000) |
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| articulation of pisiform bone | The synovial joint between the pisiform and triquetrum; it is separate from the other intercarpal joints. Synonym: articulatio ossis pisiformis, articulation of pisiform bone. (05 Mar 2000) |
| basal bone | The osseus tissue of the mandible and maxillae except the alveolar processes. (05 Mar 2000) |
| basal part of occipital bone | The part of the occipital bone that lies anterior to the foramen magnum and joins with the body of the sphenoid bone. Synonym: pars basilaris ossis occipitalis, basal part of occipital bone, basilar apophysis, basilar process of occipital bone, basilar process, basiocciput. (05 Mar 2000) |
| base of hyoid bone | The body of the hyoid bone, from which the greater and lesser horns extend. Synonym: corpus ossis hyoidei, base of hyoid bone, basihyal, basihyoid. (05 Mar 2000) |
| base of metacarpal bone | The expanded proximal extremity of each metacarpal that articulates with one or more of the distal row of carpal bones. Synonym: basis ossis metacarpalis. (05 Mar 2000) |
| base of metatarsal bone | The expanded proximal extremity of each metatarsal bone; it articulates with one or more of the distal row of tarsal bones. Synonym: basis ossis metatarsalis. (05 Mar 2000) |
| basilar bone | The developmental basilar process of the occipital bone which unites with the condylar portions in about the fourth or fifth year, becoming the basilar part of the occipital bone. Synonym: basioccipital bone, os basilare. (05 Mar 2000) |
| basilar part of the occipital bone | The part of the occipital bone that lies anterior to the foramen magnum and joins with the body of the sphenoid bone. Synonym: pars basilaris ossis occipitalis, basal part of occipital bone, basilar apophysis, basilar process of occipital bone, basilar process, basiocciput. (05 Mar 2000) |
| basilar process of occipital bone | The part of the occipital bone that lies anterior to the foramen magnum and joins with the body of the sphenoid bone. Synonym: pars basilaris ossis occipitalis, basal part of occipital bone, basilar apophysis, basilar process of occipital bone, basilar process, basiocciput. (05 Mar 2000) |
| basioccipital bone | The developmental basilar process of the occipital bone which unites with the condylar portions in about the fourth or fifth year, becoming the basilar part of the occipital bone. Synonym: basioccipital bone, os basilare. (05 Mar 2000) |
| basisphenoid bone | In comparative anatomy, the bone in the floor of the braincase in the region of the pituitary. See: body of sphenoid bone. (05 Mar 2000) |
| benign bone aneurysm | <radiology> ABC, 10 - 30 yrs, 75% before skeletal maturity, sites: long bones; also, flat bones Findings: metaphyseal if unfused, metaepiphyseal after fusion, lytic, expansile, thin, continuous rim, thin internal bony strands (12 Dec 1998) |
| blade bone | A large, flat, triangular bone that forms the posterior portion of the shoulder. It articulates with the clavicle (at the acromion process) and the humerus (at the glenoid). (27 Sep 1997) |
| blind foramen of frontal bone | <anatomy> Blind or caecal foramen of the frontal bone; the blind foramen formed immediately anterior to the crista galli by a notch at the lower end of the frontal crest and its articulation with the ethmoid bone. It is insignificant postnatally, but gives passage to vessels during development. Synonym: foramen caecum ossis frontalis, blind foramen of frontal bone, caecal foramen of frontal bone. (05 Mar 2000) |