| APL | abductor pollicis longus; accelerated painless labor; acute promyelocytic leukemia; animal placenta ... |
|---|---|
| CA | anterior commissure [Lat. commissura anterior]; calcium antagonist; California [rabbit]; cancer; Can... |
| LADA | laboratory animal dander allergy; left acromio-dorso-anterior [position]; left anterior descending a... |
| OA | obstructive apnea; occipital artery; occipito-anterior; occiput anterior; octanoic acid; ocular albi... |
| Sa | the most anterior point of the anterior contour of the sella turcica [point]; saline; Staphylococcus... |
| spina bifida | A congenital limited defect in the spinal column, characterised by the absence of the vertebral arches through which the spinal membranes and spinal cord may protrude. (27 Sep 1997) |
|---|---|
| spina bifida aperta | A bony defect in the vertebral column through which the meningeal membranes that cover the spinal cord and part of the spinal cord protrude. An alternative term is meningomyelocele. (12 Dec 1998) |
| spina bifida cystica | A bony defect in the vertebral column through which the meningeal membranes that cover the spinal cord and part of the spinal cord protrude. An alternative term is meningomyelocele. (12 Dec 1998) |
| spina bifida manifesta | A bony defect in the vertebral column through which the meningeal membranes that cover the spinal cord and part of the spinal cord protrude. An alternative term is meningomyelocele. (12 Dec 1998) |
| spina bifida occulta | Literally, a hidden cleft in the spine. A bony defect in the vertebral column which remains hidden, covered by skin (12 Dec 1998) |
| spina dorsalis | The series of vertebrae that extend from the cranium to the coccyx, providing support and forming a flexible bony case for the spinal cord. Synonym: columna vertebralis, backbone, dorsal spine, rachis, spina dorsalis, spina, spina, spinal column, spine, vertebrarium. (05 Mar 2000) |
| spina frontalis | S, nasalis ossis frontalis. (05 Mar 2000) |
| spina helicis | An anteriorly directed spine at the extremity of the crus of the helix of the auricle. Synonym: spina helicis, apophysis helicis. (05 Mar 2000) |
| spina iliaca posterior inferior | Spine at the inferior end of the posterior border of the ilium between the posterior superior iliac spine and the greater sciatic notch; it forms the upper margin of the latter. Synonym: spina iliaca posterior inferior. (05 Mar 2000) |
| spina iliaca posterior superior | The posterior extremity of the iliac crest, the uppermost point of attachment of the sacrotuberous and posterior sacroiliac ligaments; a readily apparent dimple occurs in the skin overlying the posterior superior iliac spine which is clinically useful as an indication of the level of the S-2 vertebra, the level of the inferior limit of the subarachnoid space. Synonym: spina iliaca posterior superior. (05 Mar 2000) |
| spina ischiadica | A pointed process from the posterior border of the ischium on a level with the lower border of the acetabulum; gives attachment to the sacrospinous ligament; the pudendal nerve passes dorsal to the ischial spine, which is palpable per vagina or rectum, and thus is used as a target for the needle-tip in administering a pudendal nerve block. Synonym: spina ischiadica, ischiadic spine, sciatic spine. (05 Mar 2000) |
| spina meatus | Small bony prominence anterior to the supramastoid pit at the posterosuperior margin of the bony external acoustic meatus. Synonym: spina suprameatica, Henle's spine, meatal spine, spina meatus. (05 Mar 2000) |
| spina mentalis | A slight projection, sometimes two, in the middle line of the posterior surface of the body of the mandible, giving attachment to the geniohyoid muscle (below) and the genioglossus (above). Synonym: spina mentalis, genial tubercle. (05 Mar 2000) |
| spina ossis sphenoidalis | A posterior and downward projection from the greater wing of the sphenoid bone on either side, located posterolateral to the foramen spinosum, so-named for its proximity to the sphenoidal spine; gives attachment to the sphenomandibular ligament. Synonym: processus spinosus, spina ossis sphenoidalis, alar spine, angular spine, spina angularis, spinous process. (05 Mar 2000) |
| spina pedis | An obsolete term for a hard or soft corn. (05 Mar 2000) |