| za | <chemical> An old solfeggio name for B flat; the seventh harmonic, as heard in the or aeolian string; so called by Tartini. It was long considered a false, but is the true note of the chord of the flat seventh. Source: Websters Dictionary (01 Mar 1998) |
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| zachun | <botany> An oil pressed by the Arabs from the fruit of a small thorny tree (Balanites aegyptiaca), and sold to piligrims for a healing ointment. Source: Websters Dictionary (01 Mar 1998) |
| zaerthe | <zoology> Same as Zarthe. Source: Websters Dictionary (01 Mar 1998) |
| Zaffaroni system | A chromatographic system for the separation of steroids. (05 Mar 2000) |
| Zaffaroni, Alejandro | <person> U.S. Chemist and biochemist, *1923. See: Zaffaroni system. (05 Mar 2000) |
| Zaglas' ligament | <anatomy> A short thick fibrous band extending from the posterior superior spine of the ilium to the second transverse tubercle of the sacrum. (05 Mar 2000) |
| Zaglas, John | <person> 19th century anatomist's assistant in Edinburgh. See: Zaglas' ligament. (05 Mar 2000) |
| Zahn's infarct | A pseudoinfarct of the liver, consisting of an area of congestion with parenchymal atrophy but no necrosis; due to obstruction of a branch of the portal vein. (05 Mar 2000) |
| Zahn, Friedrich | <person> German pathologist, 1845-1904. See: Zahn's infarct, lines of Zahn, striae of Zahn. (05 Mar 2000) |
| zalambdodont | <zoology> Of or pertaining to a tribe (Zalambdodonta) of Insectivora in which the molar teeth have but one V-shaped ridge. Source: Websters Dictionary (01 Mar 1998) |
| zalcitabine | <chemical> A dideoxynucleoside compound in which the 3'-hydroxy group on the sugar moiety has been replaced by a hydrogen. This modification prevents the formation of phosphodiester linkages which are needed for the completion of nucleic acid chains. The compound is a potent inhibitor of HIV replication at low concentrations, acting as a chain-terminator of viral DNA by binding to reverse transcriptase. Its principal toxic side effect is axonal degeneration resulting in peripheral neuropathy. Pharmacological action: anti-HIV agents, antimetabolites, reverse transcriptase inhibitors. Chemical name: Cytidine, 2',3'-dideoxy- (12 Dec 1998) |
| zamang | <botany> An immense leguminous tree (Pithecolobium Saman) of Venezuela. Its branches form a hemispherical mass, often one hundred and eighty feet across. The sweet pulpy pods are used commonly for feeding cattle. Also called rain tree. Source: Websters Dictionary (01 Mar 1998) |
| Zambesi ulcer | An ulcer, usually single, about 3 cm in diameter, on the foot or leg, occurring in laborers in the Zambesi Delta; it has a sloughing surface, but does not spread and produces no constitutional symptoms or glandular enlargement; it is associated with the presence of a spirillum and a large fusiform bacillus; one attack seems to confer a partial immunity. (05 Mar 2000) |
| zambia | A republic in southern africa, south of democratic republic of the congo and tanzania, and north of zimbabwe. Its capital is lusaka. It was formerly called northern rhodesia. Under the jurisdiction of the british south africa company 1889-1924, it became a british protectorate in 1924, then part of the federation of rhodesia and nyasaland 1953-63. It became an independent republic in 1964. The country takes its name from the zambezi river flowing through it, the fourth longest on the continent. Za (river) also gave its name to zaire. (12 Dec 1998) |
| Zambusch, Leo von | <person> 20th century German physician. See: generalised pustular psoriasis of Zambusch. (05 Mar 2000) |