| Trombicula | The chigger mite, a genus of mites (family Trombiculidae) whose larvae (chiggers, red bugs) include pests of humans and other animals, and vectors of rickettsial and probably viral diseases. (05 Mar 2000) |
|---|---|
| Trombicula akamushi | leptotrombidium akamushi |
| Trombicula alfreddugesi | A species common in second growth and grassy brush areas of the Americas; the larvae attack humans (as well as reptiles, birds, and wild and domestic animals), causing an intensely itching dermatitis. (05 Mar 2000) |
| Trombicula deliensis | See: Leptotrombidium, Leptotrombidium akamushi. (05 Mar 2000) |
| trombiculiasis | Infestation with mites of the genus trombicula, whose larvae carry the rickettsial agent of scrub typhus. (12 Dec 1998) |
| trombiculid | Common name for members of the family Trombiculidae. (05 Mar 2000) |
| trombiculid mites | The larva of mites of the genus trombicula which attack man and other vertebrates, causing dermatitis and severe allergic reactions. One species is the carrier of scrub typhus or tsutsugamushi disease. (12 Dec 1998) |
| Trombiculidae | A family of mites whose larvae (redbugs, rougets, harvest mites, scrub mites, or chiggers) are parasitic on vertebrates and whose nymphs and adults are bright red and free-living, living on insect eggs or minute organisms in the soil. The six-legged larvae are barely visible red or orange parasites that attach to the skin for a few days to a month, producing an exceedingly irritating reaction. In the Orient, trombiculid chiggers of the genus Leptotrombidium transmit tsutsugamushi disease caused by Rickettsia tsutsugamushi, which is transovarially transmitted in these mites. (05 Mar 2000) |
| Trombidiidae | A family of mites that formerly included the subfamily Trombiculinae, now raised to the family Trombiculidae (including the vectors of tsutsugamushi disease). Trombidiidae larvae are characteristically parasitic on insects, not on vertebrates as with the larvae of Trombiculidae. (05 Mar 2000) |
| trombone | 1. A powerful brass instrument of the trumpet kind, thought by some to be the ancient sackbut, consisting of a tube in three parts, bent twice upon itself and ending in a bell. The middle part, bent double, slips into the outer parts, as in a telescope, so that by change of the vibrating length any tone within the compass of the instrument (which may be bass or tenor or alto or even, in rare instances, soprano) is commanded. It is the only member of the family of wind instruments whose scale, both diatonic and chromatic, is complete without the aid of keys or pistons, and which can slide from note to note as smoothly as the human voice or a violin. Softly blown, it has a rich and mellow sound, which becomes harsh and blatant when the tones are forced; used with discretion, its effect is often solemn and majestic. 2. <zoology> The common European bittern. Origin: It, aug. Of tromba a trumpet: cf. F. Trombone. See Trump a trumpet. Source: Websters Dictionary (01 Mar 1998) |
| tromethamine | <chemical> An organic amine proton acceptor. It is used in the synthesis of surface-active agent and pharmaceuticals; as an emulsifying agent for cosmetic creams and lotions, mineral oil and paraffin wax emulsions, is a biological buffer, and is used as an alkaliser. Pharmacological action: buffers, excipient. Chemical name: 1,3-Propanediol, 2-amino-2-(hydroxymethyl)- (12 Dec 1998) |
| trommel | <chemical> A revolving buddle or sieve for separating, or sizing, ores. Origin: Cf. G. Trommel a drum. Source: Websters Dictionary (01 Mar 1998) |
| Tromner | Ernest L.O., German neurologist, *1868. See: Tromner's reflex. (05 Mar 2000) |
| Tromner's reflex | A modified Rossolimo reflex in which, with the fingers of the patient partially flexed, the tapping of the volar aspect of the tip of the middle or index finger causes flexion of all four fingers and thumb; seen in pyramidal tract lesions with moderate spasticity. (05 Mar 2000) |
| trompil | An aperture in a tromp. Origin: OF. Trompille, equiv. To F. Trompette a trumpet. Source: Websters Dictionary (01 Mar 1998) |