| BG | basal ganglion; basic gastrin; Bender Gestalt [test]; beta-galactosidase; beta-glucuronidase; bicolo... |
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| BI | background interval; bacterial or bactericidal index; base-in [prism]; basilar impression; Billroth ... |
| BIS | bone cement implantation syndrome; Brain Information Service; building illness syndrome |
| BMP | bone morphogenetic protein |
| BRA | bilateral renal agenesis; bone-resorbing activity; brain-reactive antibody |
| hyoid bone | <anatomy> A U-shaped bone lying between the mandible and the larynx, suspended from the styloid processes by slender stylohyoid ligaments. See: hyoid apparatus. Synonym: os hyoideum, lingual bone, tongue bone. (05 Mar 2000) |
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| sieve bone | A horizontal lamina from which are suspended the labyrinth, on either side, and the lamina perpendicularis in the centre; it fits into the ethmoidal notch of the frontal bone and supports the olfactory lobes of the cerebrum, being pierced with numerous openings for the passage of the olfactory nerves. Synonym: lamina cribrosa ossis ethmoidalis, cribrum, sieve bone, sieve plate. (05 Mar 2000) |
| simple bone cyst | <radiology> Unicameral or solitary bone cyst, lytic, unilocular, central, meta-diaphyseal, humerus (most common site), age 0 - 10 yrs Differential diagnosis: bubbly bone lesions (12 Dec 1998) |
| solitary bone cyst | A unilocular cyst containing serous fluid and lined with a thin layer of connective tissue, occurring usually in the shaft of a long bone in a child. Synonym: idiopathic bone cavity, osteocystoma, simple bone cyst, traumatic bone cyst, unicameral bone cyst. (05 Mar 2000) |
| sphenoidal angle of parietal bone | The anterior inferior angle of the parietal bone. Synonym: angulus sphenoidalis ossis parietalis, sphenoid angle, sphenoidal angle, Welcker's angle. (05 Mar 2000) |
| sphenoidal border of temporal bone | The part of the border of the squamous part of the temporal bone that articulates with the greater wing of the sphenoid. Synonym: margo sphenoidalis ossis temporalis. (05 Mar 2000) |
| sphenoid bone | A bone of most irregular shape occupying the base of the skull; it is described as consisting of a central portion, or body, and six processes: two greater wings, two lesser wings and two pterygoid processes; it articulates with the occipital, frontal, ethmoid, and vomer, and with the paired temporal, parietal, zygomatic, palatine and sphenoidal concha bones. Synonym: os sphenoidale, sphenoid. (05 Mar 2000) |
| sphenoid process of palatine bone | The posterior and smaller of the two processes at the extremity of the vertical plate of the palatine bone; processus sphenoidalis cartilaginis septi nasi, processus posterior cartilaginis septi nasi. Synonym: processus sphenoidalis, sphenoid process. (05 Mar 2000) |
| splint bone | The second or fourth, or internal or external small metacarpal bone's in the horse; these are splinter-like in shape and lie on either side of the metacarpal or cannon bone. Synonym: fibula. (05 Mar 2000) |
| spongy bone | A turbinated bone. (05 Mar 2000) |
| squamous border of parietal bone | The lateral border of the parietal bone that articulates with the squamous part of the temporal bone. Synonym: margo squamosus ossis parietalis. (05 Mar 2000) |
| squamous border of sphenoid bone | The margin of the greater wing of the sphenoid bone that articulates with the squamous part of the temporal bone. Synonym: margo squamosus ossis sphenoidalis. (05 Mar 2000) |
| squamous part of frontal bone | The broad curved portion of the frontal bone forming the forehead. Synonym: squama frontalis. (05 Mar 2000) |
| squamous part of occipital bone | The tabular or squamous portion of occipital bone. Synonym: squama occipitalis, occipital squama, frontal squama. (05 Mar 2000) |
| squamous part of temporal bone | The broad, flat, thin (scale-like) anterior and superior portion of the temporal bone forming part of the lateral wall of the cranial vault. Synonym: pars squamosa ossis temporalis, squama temporalis, temporal squama. (05 Mar 2000) |