| LS | lateral suspensor; left sacrum; left septum; left side; legally separated; leiomyosarcoma; length of... |
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| LSO | lateral superior olive; left salpingo-oophorectomy; left superior oblique; lumbosacral orthosis |
| LST | lateral spinothalamic tract; left sacrotransverse [fetal position]; life-sustaining treatment |
| LSV | lateral sacral vein; left subclavian vein; longitudinal sound velocity |
| lt | lat left lateral |
| lateral ligament of malleus | A short fan-shaped ligament converging from the posterior half of the tympanic notch to the neck of the malleus. Synonym: ligamentum mallei laterale. (05 Mar 2000) |
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| lateral ligament of temporomandibular joint | <anatomy> The capsular ligament that passes obliquely down and backward across the lateral surface of the temporomandibular joint. Synonym: ligamentum laterale articulationis temporomandibularis, Ferrein's ligament, lateral ligament of temporomandibular joint, ligamentum temporomandibulare, temporomandibular ligament. (05 Mar 2000) |
| lateral ligament of wrist | The ligament that extends distally from the styloid process of the radius to the carpal bones. Synonym: ligamentum collaterale carpi radiale, external collateral ligament of wrist, lateral ligament of wrist. (05 Mar 2000) |
| lateral ligaments of the bladder | Condensations of fibroareolar tissue which pass one from each side of the bladder to blend with the pelvic fascia; smooth muscle is usually present in this tissue and is referred to as the musculus rectovesicalis. (05 Mar 2000) |
| lateral limb | Limb or leg-like portion of a structure, farthest from midline. Synonym: crus laterale, lateral limb. (05 Mar 2000) |
| lateral line sense organ | A structure in fish consisting of a long groove or canal extending along each side of the trunk and tail and branching in the head region; the groove or tube is lined with neuroepithelial cells, some of which are in groups known as neuromasts; its function appears to be the detection of vibrations of low frequency. Synonym: neuromast organ. (05 Mar 2000) |
| lateral line system | A series of sense organs that detect pressure or vibrations along the head and side of cyclostomes, fishes, and some amphibians. (05 Mar 2000) |
| lateral lingual swellings | In the embryo, paired oval elevations that appear in the floor of the mouth at mandibular arch level; the primordial elevations, composed of mesenchyme covered by ectoderm of stomodeal origin, merge to form the greater part of the anterior two thirds of the tongue. (05 Mar 2000) |
| lateral lip of linea aspera | The lateral margin of the linea aspera of the femur that gives attachment to the lateral intermuscular septum and the short head of the biceps femoris muscles. Synonym: labium laterale lineae asperae. (05 Mar 2000) |
| lateral lithotomy | Lithotomy in which the perineum is incised to one side of the median line. (05 Mar 2000) |
| lateral longitudinal arch of foot | Formed by calcaneus, cuboid and two lateral metatarsals; the combined arch is supported normally by ligaments, intrinsic muscles, and the tendons of extrinsic muscles of the foot. Synonym: arcus pedis longitudinalis pars lateralis. (05 Mar 2000) |
| lateral longitudinal stria | A thin longitudinal band of nerve fibres accompanied by gray matter, near each outer edge of the upper surface of the corpus callosum under cover of the cingulate gyru. Synonym: stria longitudinalis lateralis, stria tecta, tectal stria. (05 Mar 2000) |
| lateral lumbar intertransversarii muscles | Origin, transverse processes of lumbar vertebrae; insertion, next superior transverse process; action, abducts lumbar vertebrae; nerve supply, ventral branches of lumbar nerves. Synonym: musculi intertransversarii laterales lumborum, lateral lumbar intertransverse muscles. (05 Mar 2000) |
| lateral lumbar intertransverse muscles | Origin, transverse processes of lumbar vertebrae; insertion, next superior transverse process; action, abducts lumbar vertebrae; nerve supply, ventral branches of lumbar nerves. Synonym: musculi intertransversarii laterales lumborum, lateral lumbar intertransverse muscles. (05 Mar 2000) |
| lateral lumbocostal arch | <anatomy> One of Haller's arches; a thickening of the fascia of the quadratus lumborum muscle between the transverse process of the first lumbar vertebra and the twelfth rib on either side that gives attachment to a portion of the diaphragm. Synonym: ligamentum arcuatum laterale, arcus lumbocostalis lateralis, lateral lumbocostal arch. (05 Mar 2000) |