| leman | A sweetheart, of either sex; a gallant, or a mistress; usually in a bad sense. Origin: OE. Lemman, legman; AS.leof dear + mann man. See Lief, and Man. Source: Websters Dictionary (01 Mar 1998) |
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| Lembert suture | The second row of the Czerny-Lembert intestinal suture; an inverting suture for intestinal surgery, used either as a continuous suture or interrupted suture, producing serosal apposition and including the collagenous submucosal layer but not entering the lumen of the intestine. (05 Mar 2000) |
| Lembert, Antoine | <person> French surgeon, 1802-1851. See: Lembert suture, Czerny-Lembert suture. (05 Mar 2000) |
| leme | A ray or glimmer of light; a gleam. Origin: OE. Leem, leme, leam, AS. Leoma light, brightness; akin to E. Light. Source: Websters Dictionary (01 Mar 1998) |
| Lemli, Luc | <person> 20th century U.S. Paediatrician. See: Smith-Lemli-Opitz syndrome. (05 Mar 2000) |
| lemma | The lower of two bracts enclosing a grass flower. (09 Oct 1997) |
| lemming | <zoology> Any one of several species of small arctic rodents of the genera Myodes and Cuniculus, resembling the meadow mice in form. They are found in both hemispheres. The common Northern European lemming (Myodes lemmus) is remarkable for making occasional devastating migrations in enormous numbers from the mountains into the lowlands. Origin: Nor. Lemming, lemende; cf. Sw. Lemel, Lapp. Lummik. Source: Websters Dictionary (01 Mar 1998) |
| lemmoblast | In an embryo, a cell of neural crest origin capable of forming a cell of the neurilemma sheath. Origin: G. Lemma, husk, + blastos, germ (05 Mar 2000) |
| lemmocyte | One of the cells of the neurolemma. Origin: G. Lemma, husk, + kytos, cell (05 Mar 2000) |
| lemnian | Of or pertaining to the isle of Lemnos. Lemnian bole, Lemnian earth, an aluminous earth of a grayish yellow colour; sphragide; formerly sold as medicine, having astringent properties. Lemnian reddle, a reddle of firm consistence and deep red colour; used by artificers in colouring. Origin: L. Lemnius, fr. Lemnus, Gr. Source: Websters Dictionary (01 Mar 1998) |
| lemniscal trigone | A triangular area on the lateral surface of the caudal half of the mesencephalon, bordered caudally by the slight prominence of the lateral lemniscus, dorsally by the base of the inferior colliculus and the brachium of the superior colliculus, and ventrally by the crus cerebri. Synonym: Reil's triangle, triangle of fillet, trigone of fillet, trigonum lemnisci. (05 Mar 2000) |
| lemniscate | <geometry> A curve in the form of the figure 8, with both parts symmetrical, generated by the point in which a tangent to an equilateral hyperbola meets the perpendicular on it drawn from the center. Origin: L. Lemniscatus adorned with ribbons, fr. Lemniscus a ribbon having down, Gr. Source: Websters Dictionary (01 Mar 1998) |
| lemniscus | Origin: L. See Lemniscata. <zoology> One of two oval bodies hanging from the interior walls of the body in the Acanthocephala. Source: Websters Dictionary (01 Mar 1998) |
| lemniscus lateralis | A bundle of ascending fibres that originate from the cochlear and auditory relay nuclei of the rhombencephalon, enter the trapezoid body, a transverse fibre stratum in which about half their number decussate, and from here turn rostrally along the lateral side of the spinothalamic tract; in the midbrain, it arches dorsally and enters the inferior colliculus in which all of its fibres terminate; the auditory pathway is transsynaptically extended from here by the brachium of the inferior colliculus to the medial geniculate body of the thalamus, from which in turn the auditory radiation leads to the auditory cortex; intercalated in the trapezoid body and along the ascending trajectory of the lemniscus are several cell groups in which part of the fibres synapse. Synonym: lemniscus lateralis, acoustic lemniscus, auditory lemniscus, auditory tract, lateral fillet. (05 Mar 2000) |
| lemniscus medialis | A band of white fibres originating from the gracile and cuneate nuclei and decussating in the lower medulla; thence it passes upward through the centre of the medulla oblongata, close to the median raphe; on entering the pons it spreads out laterally to form a flat band ascending over the dorsal border of the pontine nuclei; in the mesencephalon it passes over the dorsal border of the substantia nigra and is displaced laterally by the red nucleus; passing medial to the medial geniculate body, the bundle enters and terminates in the ventral posterior nucleus of the thalamus. Throughout their course, the fibres retain a somatotopic order such that those originating from the gracile nucleus and representing the lower extremity lie lateral to those originating in the cuneate nucleus and representing the arm. The medial lemniscus conveys somatic-sensory information involved in tactile discrimination (two-point discrimination), position sense, and vibration sense. Synonym: lemniscus medialis, medial fillet, Reil's band, Reil's ribbon. (05 Mar 2000) |