| DS | dead air space; dead space; deep sedative; deep sleep; defined substrate; dehydroepiandrosterone sul... |
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| FSU | family service unit; functional spine unit |
| LESS | lateral electrical spine stimulation |
| LS | lateral suspensor; left sacrum; left septum; left side; legally separated; leiomyosarcoma; length of... |
| LS-BMD | lumbar spine bone mineral density |
| 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) |
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| unstable cervical spine fractures | <radiology> Flexion: bilateral interfacetal dislocation, flexion teardrop fracture (usually C5 or C6) extension: extension teardrop fracture (usually C2 or C3), hangman's fracture, extension-dislocation, extension-fracture-dislocation, odontoid fracture vertical compression: Jefferson burst fracture see: cervical spine fractures (12 Dec 1998) |
| lesser tympanic spine | The posterior edge of the tympanic notch (of Rivinus). Synonym: spina tympanica minor. (05 Mar 2000) |