| thallic | <chemistry> Of or pertaining to thallium; derived from, or containing, thallium; specifically, designating those compounds in which the element has a higher valence as contrasted with the thallous compounds; as, thallic oxide. Source: Websters Dictionary (01 Mar 1998) |
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| thalline | <botany> Consisting of a thallus. <chemistry> An artificial alkaloid of the quinoline series, obtained as a white crystalline substance, C10H13NO, whose salts are valuable as antipyretics; so called from the green colour produced in its solution by certain oxidizing agents. Origin: Gr. A young shoot or branch. Source: Websters Dictionary (01 Mar 1998) |
| thallious | <chemistry> See Thallous. Source: Websters Dictionary (01 Mar 1998) |
| thallium | <chemistry> A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7. Origin: NL, fr. Gr. Young or green shoot or branch, twig. So called from a characteristic bright green line in its spectrum. Source: Websters Dictionary (01 Mar 1998) |
| thallium 201 | <radiology> Tl-201, half-life: 73 hours (ca. 3 days), radiation: 68-80 keV photons (mercury X-rays), 135 and 167 keV gamma rays, cyclotron produced see: myocardial perfusion imaging (12 Dec 1998) |
| thallium heart scan | <cardiology, investigation, radiology> A test which involves the introduction of a radioactive tracer into the bloodstream. The radioactive tracer is then measured with a special camera and a determination of coronary artery blood flow can be made. (27 Sep 1997) |
| thallium poisoning | A condition characterised by vomiting, diarrhoea, leg pains, and severe sensorimotor polyneuropathy; about three weeks after poisoning, temporary extensive loss of hair typically occurs; usually occurs after accidental ingestion of a rodenticide. (05 Mar 2000) |
| thallium radioisotopes | Unstable isotopes of thallium that decay or disintegrate emitting radiation. Tl atoms with atomic weights 198-202, 204, and 206-210 are thallium radioisotopes. (12 Dec 1998) |
| thallium stress test | <cardiology, investigation> This test is used to assess coronary blood flow before and after a period of strenuous exercise. Thallium testing involves the introduction of a radioactive tracer into the bloodstream. The radioactive tracer is then measured with a special camera and a determination of coronary artery blood flow can be made. (27 Sep 1997) |
Synonyms :
Synonyms : Radioisotopes, Thallium
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| thallium |
a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores
Ãâó: wordnet.princeton.edu/perl/webwn
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| thallic |
(1) of the thallus; (2) of conidiogenesis, one of the two basic sorts of conidiogenesis, in which any enlargement of the recognisable conidial initial occurs after the initial has been delimited by one or more septa; the conidium is differentiated from a whole cell (Hawksworth et al., 1983). cf. blastic.
Ãâó: www.anbg.gov.au/glossary/webpubl/fungloss.htm
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| thalli |
THALL-i Nonsexual parts of algae and fungi. 464, 477
Ãâó: www.mhhe.com/biosci/genbio/life/glossaryt.mhtml
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| thallium |
CAS Number: 7440-28-0. A sparsely but widely distributed poisonous metallic element that resembles lead in physical properties and is used chiefly in the form of compounds in photoelectric cells or as a pesticide. Chemical symbol: Tl. Molecular weight = 204.3833 g/mol.
Ãâó: www.pca.state.mn.us/gloss/glossary.cfm
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| thallic |
Said of conidia produced where there is no enlargement or new growth of the conidia initially prior to its delineation by a septa. The entire parent cell becomes the conidium.
Ãâó: www.ec.upstate.edu/medtech/microb/glossary.htm
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| thalli | a soft gray malleable metallic element that resembles tin but discolors on exposure to air |
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