| lana | Synonym: wool. Origin: L. (05 Mar 2000) |
|---|---|
| lanarkite | <chemical> A mineral consisting of sulphate of lead, occurring either massive or in long slender prisms, of a greenish white or gray colour. Origin: From Lanarkshire, a county in Scotland. Source: Websters Dictionary (01 Mar 1998) |
| lanate | Wooly, with long, intertwined, curled hairs. (09 Oct 1997) |
| lanatoside D | A digitales glycoside from the leaves of Digitalis lanata, yielding the genin diginatigenin (12-hydroxygitoxigenin; 16-hydroxydigoxigenin). (05 Mar 2000) |
| lanatosides | <chemical> Glycosides from digitalis lanata leaf. Lantoside c has actions similar to digoxin. Mixtures or lantosides a, b, and c have also been used. Pharmacological action: anti-arrhythmia agents, cardiotonic agent, enzyme inhibitors. (12 Dec 1998) |
| lanatosides A, B, and C | Digilanides A, B, and C; the cardioactive precursor glycosides obtained from Digitalis lanata. Removal of the acetyl group yields desacetyllanatosides A, B, and C (purpurea glycosides A, B, and C, respectively); removal of the glucose from lanatosides A, B, and C yields acetyldigitoxin, acetylgitoxin, and acetyldigoxin, respectively; removal of glucose and the acetyl group yields digitoxin, gitoxin, and digoxin, respectively. See: purpurea glycosides A. (05 Mar 2000) |
| lance | 1. A weapon of war, consisting of a long shaft or handle and a steel blade or head; a spear carried by horsemen, and often decorated with a small flag; also, a spear or harpoon used by whalers and fishermen. "A braver soldier never couched lance." (Shak) 2. A soldier armed with a lance; a lancer. 3. A small iron rod which suspends the core of the mold in casting a shell. 4. An instrument which conveys the charge of a piece of ordnance and forces it home. 5. <chemistry> One of the small paper cases filled with combustible composition, which mark the outlines of a figure. Free lance, in the Middle Ages, and subsequently, a knight or roving soldier, who was free to engage for any state or commander that purchased his services; hence, a person who assails institutions or opinions on his own responsibility without regard to party lines or deference to authority. Lance bucket, a kind of fuse filled with a composition which burns with a suffocating odour; used in the counter operations of miners. To break a lance, to engage in a tilt or contest. Origin: OE. Lance, F. Lance, fr. L. Lancea; cf. Gr. Cf. Launch. Source: Websters Dictionary (01 Mar 1998) |
| lance fish | <zoology> A slender marine fish of the genus Ammodytes, especially Ammodytes tobianus of the English coast. Synonym: sand lance. Source: Websters Dictionary (01 Mar 1998) |
| Lancefield | Rebecca Craighill, U.S. Bacteriologist, *1895. See: Lancefield classification. (05 Mar 2000) |
| Lancefield classification | A serologic classification dividing haemolytic streptococci into groups (A to O) which bear a definite relationship to their sources, based upon precipitation tests depending upon group-specific substances that are carbohydrate in nature; e.g., Group A contains strains pathogenic for man; B, strains from mastitis in cows and from normal milk, including a few strains from the human throat and vagina; C, strains from various lower animals, including a number from cattle; D, strains from cheese; E, strains from certified milk; F, strains mainly from the human throat, associated with tonsillitis; G, strains from man, a few from monkeys and dogs; and H, K, and O, nonpathogenic strains from normal human respiratory tracts. (05 Mar 2000) |
| lancelet | <zoology> A small fishlike animal (Amphioxus lanceolatus), remarkable for the rudimentary condition of its organs. It is the type of the class Leptocardia. See Amphioxus, Leptocardia. Origin: Lance + -let. Source: Websters Dictionary (01 Mar 1998) |
| lanceolar | <botany> Lanceolate. Origin: L. Lanceola a little lance, dim. Of lancea lance: cf. F. Lanceolaire. Source: Websters Dictionary (01 Mar 1998) |
| lanceolate | Lancelike, of a leaf, about four times as long as it is broad, broadest in the lower half and tapering towards the tip. (09 Oct 1997) |
| lanceolated | <botany> Rather narrow, tapering to a point at the apex, and sometimes at the base also; as, a lanceolate leaf. Origin: L. Lanceolatus: cf. F. Lanceol. See Lanceolar. Source: Websters Dictionary (01 Mar 1998) |
| lancet | 1. A surgical instrument of various forms, commonly sharp-pointed and two-edged, used in venesection, and in opening abscesses, etc. 2. <chemistry> An iron bar used for tapping a melting furnace. Lancet arch A large, voracious, deep-sea fish (Alepidosaurus ferox), having long, sharp, lancetlike teeth. The doctor, or surgeon fish. Origin: F. Lancette, dim. Of lance lance. See Lance. Source: Websters Dictionary (01 Mar 1998) |