| electrode knife | A blade-shaped electrical instrument used to cut tissues by means of a high-frequency electrical current. (05 Mar 2000) |
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| Joseph knife | A knife for use in rhinoplasty to separate the overlying skin from the nasal dorsum. (05 Mar 2000) |
| Kirkland knife | A heart-shaped knife used in gingival surgery. (05 Mar 2000) |
| knife | Origin: OE. Knif, AS. Cnif; akin to D. Knijf, Icel. Knifr, Sw. Knif, Dan. Kniv. 1. An instrument consisting of a thin blade, usually of steel and having a sharp edge for cutting, fastened to a handle, but of many different forms and names for different uses; as, table knife, drawing knife, putty knife, pallet knife, pocketknife, penknife, chopping knife, etc. /as>. 2. A sword or dagger. "The coward conquest of a wretch's knife. <botany>" (Shak) Knife grass a tropical American sedge (Scleria latifolia), having leaves with a very sharp and hard edge, like a knife. War to the knife, mortal combat; a conflict carried to the last extremity. 1. <botany> To prune with the knife. 2. To cut or stab with a knife. Origin: Knifed; Knifing. Source: Websters Dictionary (01 Mar 1998) |
| knife needle | A very narrow, needle-pointed knife used in discission of a cataract. Synonym: cataract needle. (05 Mar 2000) |
| knife-rest crystal | A crystal of ammoniomagnesium phosphate found in alkaline urine. (05 Mar 2000) |
| fistula knife | A long, thin-bladed, probe-pointed knife for slitting open a fistula. Synonym: fistula knife, syringotome. Origin: fistula + G. Tome, a cutting (05 Mar 2000) |
| free-hand knife | A manually operated knife or blade usually used to take split-thickness skin grafts; e.g., Blair-Brown knife, Humby knife, Theirsh knife. (05 Mar 2000) |
| lenticular knife | A scraper resembling a sharp spoon. (05 Mar 2000) |
| abscopal effect | A reaction produced following irradiation but occurring outside the zone of actual radiation absorption. (05 Mar 2000) |
| additive effect | <biochemistry, chemistry> An additive effect is the overall biological effect two chemicals acting together and which is the simple sum of the effects of the chemicals acting independently. Compare: antagonism. (15 Jan 1998) |
| adverse effect | This is an abnormal or harmful effect to an organism caused by exposure to a chemical. It is indicated by some result such as death, a change in food or water consumption, altered body and organ weights, altered enzyme levels, or visible illness. An effect may be classed as adverse if it causes functional or anatomical damage, causes irreversible change in the homeostasis of the organism, or increases the susceptibility of the organism to other chemical or biological stress. A non-adverse effect will usually be reversed when the organism is no longer being exposed to the chemical. (09 Oct 1997) |
| Anrep effect | A small transient positive inotropic effect of abrupt increases of systolic aortic and left ventricular pressures related to recovery from transient subendocardial ischemia (e.g., cold pressor test). (05 Mar 2000) |
| antagonistic effect | This is the consequence of one chemical (or group of chemicals) counteracting the effects of another chemical, the opposing chemicals cancel out each other's effects. (09 Oct 1997) |
| Arias-Stella effect | Focal, unusual, decidual changes in endometrial epithelium, consisting of intraluminal budding, and nuclear enlargement and hyperchromatism with cytoplasmic swelling and vacuolation; may be associated with ectopic or uterine pregnancy. Synonym: Arias-Stella effect, Arias-Stella reaction. (05 Mar 2000) |