| luna | 1. The moon. 2. <chemistry> Silver. <chemistry> Luna cornea, a very large and beautiful American moth (Actias luna). Its wings are delicate light green, with a stripe of purple along the front edge of the anterior wings, the other margins being edged with pale yellow. Each wing has a lunate spot surrounded by rings of light yellow, blue, and black. The caterpillar commonly feeds on the hickory, sassafras, and maple. Origin: L.; akin to lucere to shine. See Light, and cf. Lune. Source: Websters Dictionary (01 Mar 1998) |
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| Luna-Ishak stain | <technique> A staining method using celestine blue and acid fuchsin in which bile canaliculi stain pink to red. (05 Mar 2000) |
| lunacy | 1. An obsolete term for a form of insanity characterised by alternating lucid and insane periods, believed to be influenced by phases of the moon. 2. Any form of insanity. 3. Insanity as defined variously by law. Origin: L. Luna, moon (05 Mar 2000) |
| lunar | 1. Of or pertaining to the moon; as, lunar observations. 2. Resembling the moon; orbed. 3. Measured by the revolutions of the moon; as, a lunar month. 4. Influenced by the moon, as in growth, character, or properties; as, lunar herbs. <medicine> Lunar caustic Tables for correcting an observed lunar distance on account of refraction and parallax. Lunar year, the period of twelve lunar months, or 354 days, 8 hours, 48 minutes, and 34.38 seconds. Origin: L. Lunaris, fr. Luna the moon. See Luna, and cf. Lunary. 1. <astronomy> A lunar distance. 2. <anatomy> The middle bone of the proximal series of the carpus. Synonym: semilunar, and intermedium. Source: Websters Dictionary (01 Mar 1998) |
| lunar caustic | Silver nitrate mixed with silver chloride and allowed to dry. Usually applied to the ends of small wooden applicator sticks or made available as pencils. These are used after wetting as a caustic chemical for the removal of warts. Synonym: fused silver nitrate, lunar caustic. (05 Mar 2000) |
| lunar periodicity | Any rhythmic phenomenon that follows a lunar or monthly cycle. (05 Mar 2000) |
| lunare | One of the proximal row in the carpus between the scaphoid and triquetral; it articulates with the radius, scaphoid, triquetral, hamate, and capitate. Synonym: os lunatum, lunare, os intermedium. (05 Mar 2000) |
| lunary | <botany> The herb moonwort or "honesty". A low fleshy fern (Botrychium Lunaria) with lunate segments of the leaf or frond. Origin: Cf. F. Lunaire. Source: Websters Dictionary (01 Mar 1998) |
| lunate | Crescent-shaped. (09 Oct 1997) |
| lunate bone | One of the proximal row in the carpus between the scaphoid and triquetral; it articulates with the radius, scaphoid, triquetral, hamate, and capitate. Synonym: os lunatum, lunare, os intermedium. (05 Mar 2000) |
| lunate cerebral sulcus | A small, inconstant semilunar groove on the cortical convexity near the occipital pole, marking the anterior border of the striate cortex (area 17) and considered homologous with the major sulcus of the same name that is a more constant feature of the cerebral cortex in monkeys and apes. Synonym: sulcus lunatus cerebri, ape fissure, lunate fissure, lunate sulcus, simian fissure. (05 Mar 2000) |
| lunate dislocation | A wrist joint injury characterised by dislocation of the lunate. (27 Sep 1997) |
| lunate fissure | A small, inconstant semilunar groove on the cortical convexity near the occipital pole, marking the anterior border of the striate cortex (area 17) and considered homologous with the major sulcus of the same name that is a more constant feature of the cerebral cortex in monkeys and apes. Synonym: sulcus lunatus cerebri, ape fissure, lunate fissure, lunate sulcus, simian fissure. (05 Mar 2000) |
| lunate sulcus | A small, inconstant semilunar groove on the cortical convexity near the occipital pole, marking the anterior border of the striate cortex (area 17) and considered homologous with the major sulcus of the same name that is a more constant feature of the cerebral cortex in monkeys and apes. Synonym: sulcus lunatus cerebri, ape fissure, lunate fissure, lunate sulcus, simian fissure. (05 Mar 2000) |
| lunate surface of acetabulum | The curved articular surface that surrounds the acetabular fossa and articulates with the head of the femur. Synonym: facies lunata acetabuli. (05 Mar 2000) |