type A

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Related to Type As: Type B personality


the general or prevailing character of any particular case, such as of a disease, person, or substance.
type A a behavior pattern characterized by excessive competitiveness and aggressiveness. See type A behavior.
asthenic type a constitutional type marked by a slender body, long neck, long, flat chest and abdomen, and poor muscular development.
athletic type a constitutional type marked by broad shoulders, deep chest, flat abdomen, thick neck, and good muscular development.
blood type
2. the phenotype of an individual with respect to a blood group system.
body type (constitutional type) a constellation of traits related to body build.
phage type a subgroup of a bacterial species susceptible to a particular bacteriophage and demonstrated by phage typing. Called also lysotype and phagotype.
pyknic type a constitutional type marked by rounded body, large chest, thick shoulders, broad head, and short neck.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

type A


Type A

Of or relating to a personality or behavior pattern that is marked by tenseness, impatience, and aggressiveness and is thought to be associated with an increased risk factor for heart disease.
A person who has this personality or exhibits this behavior pattern.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

vi·ral hep·a·ti·tis

(vīrăl hepă-tītis)
Hepatitis caused by various immunologically unrelated viruses: hepatitis A virus, hepatitis B virus, hepatitis C virus, hepatitis D virus, hepatitis E virus, and hepatitis G virus.

vi·ral hep·a·ti·tis, type A

(vīrăl hepă-tītis tīp)
A viral disease with a short (15-50 days) incubation period caused by hepatitis A virus, often transmitted by fecal-oral route.

vi·ral hep·a·ti·tis, type B

(vīrăl hepă-tītis tīp)
A viral disease with a long incubation period (usually 50-160 days), caused by a hepatitis B virus, usually transmitted by injection of infected blood or blood derivatives or by use of contaminated needles, lancets, or other instruments or by sexual transmission.
Synonym(s): infectious hepatitis, short-incubation hepatitis.

vi·ral hep·a·ti·tis, type C

(vīrăl hepă-tītis tīp)
Principal cause of non-A, non-B posttransfusion hepatitis caused by an RNA virus; high percentage of patients develop chronic liver disease leading to cirrhosis.

vi·ral hep·a·ti·tis, type D

(vīrăl hepă-tītis tīp)
Acute or chronic hepatitis caused by a satellite virus, the hepatitis delta virus; chronic type appears to be more severe than other types of viral hepatitis.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Zion Hospital in San Francisco, co-director of the original Type A research, says the new data may be based on antiquated diagnoses.
Friedman's follow-up study, reported in 1975, found that over 8 1/2 years, Type A individuals had roughly twice the chance of developing coronary heart disease as Type Bs, regardless of other risk factors such as cigarette smoking.
But Ragland and his colleagues contend that their findings suggest that efforts to enhance Type A survival through psychotherapy and behavior change may not be called for.
In the last five years, says Brand, more studies have appeared showing no relation between Type A and heart attack risk.
In a subsample of 40 youngsters and their parents, Bracke found that the origins of Type A behavior may differ for boys and girls.
Parental modeling and discipline were less clearly related to high Type A Scores among girls, says Bracke.
The Stanford findings are provocative, says Judith Siegel of the University of California at Los Angeles, but Type A behavior remains poorly defined.
But psychologist Martin Ford of Stanford says the data indicate that "Type A behavior is more than an isolated syndrome suffered by a few hard-driving executives." It is a general motivattional pattern that is learned early, says Ford.