| lass | A youth woman; a girl; a sweetheart. Origin: OE. Lasse; prob. Of Celtic origin; cf. W. Llodes girl, fem. Of llawd lad. See Lad a youth. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| lassa fever | A severe form of epidemic fever first identified in Lassa, Nigeria. It is caused by the Lassa virus, a member of Arenaviridae. The illness is characterised by high fever, sore throat, muscle aches, skin rash (with haemorrhages), headache, abdominal pain, vomiting and diarrhoea. A rat serves as a reservoir for the illness, but person to person transmission is also reported. (27 Sep 1997) |
| lassa haemorrhagic fever | A severe form of epidemic fever first identified in Lassa, Nigeria. It is caused by the Lassa virus, a member of Arenaviridae. The illness is characterised by high fever, sore throat, muscle aches, skin rash (with haemorrhages), headache, abdominal pain, vomiting and diarrhoea. A rat serves as a reservoir for the illness, but person to person transmission is also reported. (27 Sep 1997) |
| Lassa virus | <virology> Virulent and highly transmissible arenavirus whose normal host is a rodent Mastomys natalensis), first recorded from Nigeria. (18 Nov 1997) |
| lassitude | Weakness, exhaustion. Origin: L. Lassitudo = weariness (18 Nov 1997) |
| lasso | Origin: Sp. Lazo, L. Laqueus. See Lace. A rope or long thong of leather with, a running noose, used for catching horses, cattle, etc. <zoology> Lasso cell, one of a peculiar kind of defensive and offensive stinging cells, found in great numbers in all coelenterates, and in a few animals of other groups. They are most highly developed in the tentacles of jellyfishes, hydroids, and Actiniae. Each of these cells is filled with, fluid, and contains a long, slender, often barbed, hollow thread coiled up within it. When the cell contracts the thread is quickly ejected, being at the same time turned inside out. The thread is able to penetrate the flesh of various small, soft-bodied animals, and carries a subtle poison by which they are speedily paralysed and killed. The threads, at the same time, hold the prey in position, attached to the tentacles. Some of the jellyfishes, as the Portuguese man-of-war, and Cyanea, are able to penetrate the human skin, and inflict painful stings in the same way. Synonym: nettling cell, cnida, cnidocell. Source: Websters Dictionary (01 Mar 1998) |