| debris | 1. <geology> Broken and detached fragments, taken collectively; especially, fragments detached from a rock or mountain, and piled up at the base. 2. Rubbish, especially such as results from the destruction of anything; remains; ruins. Origin: F, fr. Pref. De- (L. Dis) + briser to break, shatter; perh. Of Celtic origin. Source: Websters Dictionary (01 Mar 1998) |
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| debrisoquin | <chemical> An adrenergic neuron-blocking drug similar in effects to guanethidine. It is also noteworthy in being a substrate for a polymorphic cytochrome p-450 enzyme. Persons with certain isoforms of this enzyme are unable to properly metabolise this and many other clinically important drugs. They are commonly referred to as having a debrisoquin 4-hydroxylase polymorphism. Pharmacological action: adrenergic agents, antihypertensive agents, sympatholytics. Chemical name: 2(1H)-Isoquinolinecarboximidamide, 3,4-dihydro- (12 Dec 1998) |
| debrisoquine sulfate | 3-4-Dihydro-2(1H)-isoquinolinecarboxamidine sulfate;an antihypertensive agent resembling guanethidine; used in drug metabolism studies. (05 Mar 2000) |
| organic debris | <ecology> Debris consisting of plant or animal material. (11 Jan 1998) |
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| large woody debris | Dead woody material greater than 20" in diameter on the ground or in a stream or river. It may consist of logs, trees, or parts of trees. Large woody debris contributes to long-term site productivity and health in several ways. It supplies nutrients to the soil, supports symbiotic fungi that are beneficial to conifers, and provides habitat for beneficial rodents and insects. (05 Dec 1998) |