| MI | first meiotic metaphase; maturation index; medical illustrator; medical informatics; medical inspect... |
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| MMR | mass miniature radiography; masseter muscle rigidity; maternal mortality rate; measles-mumps-rubella... |
| AIIS | Anterior Inferior Iliac Spine |
| ASIS | Anterior Superior Iliac Spine |
| PSIS | Posterior Superior Iliac Spine; 상후장골극, 위뒤장골가시 |
| spine sign | <clinical sign> Resistance to flexion of the spine in cases of meningitis. (05 Mar 2000) |
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| spine-tailed | <zoology> Having the tail quills ending in sharp, naked tips. Spine-tailed swift. <zoology> See Spinetail . Source: Websters Dictionary (01 Mar 1998) |
| Spix's spine | A pointed tongue of bone overlapping the mandibular foramen, giving attachment to the sphenomandibular ligament. Synonym: lingula mandibulae, mandibular tongue, Spix's spine. (05 Mar 2000) |
| nasal spine of frontal bone | A projection from the centre of the nasal part of the frontal bone, which lies between and articulates with the nasal bones and the perpendicular plate of the ethmoid. Synonym: spina nasalis ossis frontalis. (05 Mar 2000) |
| neural spine | The middle point of the neural arch of the typical vertebra, represented by the spinous process. (05 Mar 2000) |
| suprameatal spine | 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) |
| dendritic spine | Wine glass or mushroom shaped protrusions from dendrites that represent the principal site of termination of excitatory afferent neurons on interneurons, especially in the cortical regions. (18 Nov 1997) |
| dorsal spine | 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) |
| iliac spine | See: anterior inferior iliac spine, anterior superior iliac spine, posterior inferior iliac spine, posterior superior iliac spine. (05 Mar 2000) |
| ischiadic spine | 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) |
| ischial spine | 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) |
| thoracic spine | The thoracic region of the vertebral column; the thoracic vertebrae as a whole; that part of the vertebral column which enters into the formation of the thorax. (05 Mar 2000) |
| thoracic spine fracture | <orthopaedics> Bony fracture of one of the twelve thoracic vertebrae. (27 Sep 1997) |
| erector muscle of spine | Origin, from sacrum, ilium, and spines of lumbar vertebrae; it divides into three columns, iliocostalis musculus, longissimus musculus, and spinalis musculus, which insert into ribs and vertebrae with additional muscle slips joining the columns at successively higher levels; action, extends vertebral column; nerve supply, dorsal primary rami of spinal nerves. Synonym: musculus erector spinae, erector muscle of spine, musculus sacrospinalis. (05 Mar 2000) |
| trochlear spine | A spicule of bone arising from the edge of the trochlear fovea, giving attachment to the pulley of the superior oblique muscle of the eyeball. Synonym: spina trochlearis. (05 Mar 2000) |