| ABR | <abbreviation> Auditory brainstem response. See: auditory brainstem response audiometry. (05 Mar 2000) |
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| abrachia | Congenital absence of arms. See: amelia. Origin: G. A-priv. + brachion, arm (05 Mar 2000) |
| abrachiocephalia | Congenital absence of arms and head. Synonym: acephalobrachia. Origin: G. A-priv. + brachion, arm, + kephale, head (05 Mar 2000) |
| abrachiocephaly | Congenital absence of arms and head. Synonym: acephalobrachia. Origin: G. A-priv. + brachion, arm, + kephale, head (05 Mar 2000) |
| abrade | 1. To wear away by mechanical action. 2. To scrape away the surface layer from a part. Origin: L. Ab-rado, pp. -rasus, to scrape off (05 Mar 2000) |
| abraded wound | 1. <pathology> The wearing away of a substance or structure (such as the skin or the teeth) through some unusual or abnormal mechanical process. 2. <clinical sign> A superficial injury to the skin or other body tissue caused by rubbing or scraping resulting in an area of body surface denuded of skin or mucous membrane. (11 Nov 1997) |
| Abrahams' sign | <clinical sign> An obsolete sign: Rales and other adventitious sounds, changes in the respiratory murmurs, and increase in the whispered sound can be heard on auscultation over the acromial end of the clavicle some time before they become audible at the apex; heard primarily in pulmonary tuberculosis affecting the apical portion of the lung, a dull-flat note, i.e., one between the normal dullness at the right apex and absolute flatness, heard on percussion in that region, indicating progress from incipient to advanced tuberculosis. (05 Mar 2000) |
| Abrahams, Robert | <person> U.S. Physician, 1861-1935. See: Abrahams' sign. (05 Mar 2000) |
| abram-man | One of a set of vagabonds who formerly roamed through England, feigning lunacy for the sake of obtaining alms. To sham Abraham, to feign sickness. Origin: Possibly in allusion to the parable of the beggar Lazarus in Luke xvi. Source: Websters Dictionary (01 Mar 1998) |
| Abrams' heart reflex | A contraction of the myocardium when the skin of the precordial region is irritated. (05 Mar 2000) |
| Abrams, Albert | <person> U.S. Physician, 1863-1924. See: Abrams' heart reflex. (05 Mar 2000) |
| abranchial | <zoology> Abranchiate. Source: Websters Dictionary (01 Mar 1998) |
| abranchiata | <zoology> A group of annelids, so called because the species composing it have no special organs of respiration. Origin: NL, from Gr. Priv. +, pl, the gills of fishes. Source: Websters Dictionary (01 Mar 1998) |
| abranchiate | <zoology> Without gills. Source: Websters Dictionary (01 Mar 1998) |
| abrasion | 1. <pathology> The wearing away of a substance or structure (such as the skin or the teeth) through some unusual or abnormal mechanical process. 2. <clinical sign> A superficial injury to the skin or other body tissue caused by rubbing or scraping resulting in an area of body surface denuded of skin or mucous membrane. (11 Nov 1997) |