| adventitious | <botany> Describes roots or shoots or other parts that grow in an uncharacteristic place on a plant (such as roots growing from leaves). (06 May 1997) |
|---|---|
| adventitious albuminuria | Albuminuria resulting from the presence of blood escaping somewhere in the urinary tract, of chyle, or of some other albuminous fluid, not caused by filtration of albumin from the blood through the kidneys. Synonym: false albuminuria. (05 Mar 2000) |
| adventitious bursa | <anatomy> A bursa-like cyst formed between two parts as a result of friction. (05 Mar 2000) |
| adventitious cyst | 1. An accumulation of fluid in a cystlike loculus, but without an epithelial or other membranous lining. Synonym: adventitious cyst, false cyst. 2. A cyst whose wall is formed by a host cell and not by a parasite. 3. A mass of 50 or more Toxoplasma bradyzoites, found within a host cell, frequently in the brain; formerly called a pseudocyst, but now considered a true cyst enclosed in its own membrane within the host cell that may rupture to release particles that form new cysts, and apparently is infective to another vertebrate host. See: bradyzoite. Origin: pseudo-+ G. Kystis, bladder (05 Mar 2000) |
| adventive | In botany terminology, describes a plant which has been introduced to an area recently, in particular since colonisation by humans. (09 Oct 1997) |
| adventure | 1. That which happens without design; chance; hazard; hap; hence, chance of danger or loss. "Nay, a far less good to man it will be found, if she must, at all adventures, be fastened upon him individually." (Milton) 2. Risk; danger; peril. "He was in great adventure of his life." (Berners) 3. The encountering of risks; hazardous and striking enterprise; a bold undertaking, in which hazards are to be encountered, and the issue is staked upon unforeseen events; a daring feat. "He loved excitement and adventure." (Macaulay) 4. A remarkable occurrence; a striking event; a stirring incident; as, the adventures of one's life. 5. A mercantile or speculative enterprise of hazard; a venture; a shipment by a merchant on his own account. A bill of adventure, a writing setting forth that the goods shipped are at the owner's risk. Synonym: Undertaking, enterprise, venture, event. Origin: OE. Aventure, aunter, anter, F. Aventure, fr. LL. Adventura, fr. L. Advenire, adventum, to arrive, which in the Romance languages took the sense of "to happen, befall." See Advene. Source: Websters Dictionary (01 Mar 1998) |
| adventuress | A female adventurer; a woman who tries to gain position by equivocal means. Source: Websters Dictionary (01 Mar 1998) |
| adverse | Harmful. (18 Nov 1997) |
| adverse drug reaction reporting systems | Systems developed for collecting reports from government agencies, manufacturers, hospitals, physicians, and other sources on adverse drug reactions. (12 Dec 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) |
| adverse event | A toxic reaction to a medical therapy. (09 Oct 1997) |
| adverse reaction | Any undesirable or unwanted consequence of a preventive, diagnostic, or therapeutic procedure or regimen. (05 Mar 2000) |
| adversifolious | <botany> Having opposite leaves, as plants which have the leaves so arranged on the stem. Origin: L. Adver + folium leaf. Source: Websters Dictionary (01 Mar 1998) |
| adversive movement | A rotation of the eyes, head, or trunk about the long axis of the body. (05 Mar 2000) |
| advertisements | Public notices, usually as paid announcements and usually printed in newspapers and magazines or posted on billboards. It includes motion picture or television advertising. (12 Dec 1998) |