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`American Heritage®
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`. The
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`Medical Dictionary
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`Houghton Mifflin Company
`Boston New York
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`€111.
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`Copyright © 2007, 2004 by Houghton Mifflin
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`Dictionary, Second Edition © 2004 by Houghton
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`QWV1098765432
`
`The American Heritage medical dictionary.
`p. ; cm.
`Rev. ed. of: The American Heritage Stedman's medical
`dictionary. 2nd ed. c2004.
`Includes index.
`ISBN-13: 97841-618—824359
`ISBN-10: 0618—8243159
`i. Medicine--Dictionaries. I. American Heritage
`Stedman's medical dictionary. II. Title: Medical diction,
`ary.
`[DNLM: 1. Medicine-DictionaryrEnglish. W 13
`A5112 2007]
`R121.A4446 2007
`6103——dc22
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`2006028757
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`Manufactured in the United States of America
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`

`

`impotence
`
`402
`
`l‘
`
`in-ac-ti-vat-ed poliovirus vaccine (in-dk’t9~vfilfid)}
`Abba IPV See poliovirus vaccine (sense I).
`in-ac-tive repressor (ineak'tiv) it. See aporepre550r_
`inadequate personality (in-ad’i—kwit) n. A Poser, -
`ality disturbance characterized by an inability to C0
`lEE-
`with the soeial. emotional, occupational, and hits]
`L
`tual demands of life.
`_
`inadequate stimulus n. A stimulus too weak to CVOite 1
`response. Also called subthreshold stimulus.
`‘
`in-an-ivmate (infan’armit) adj. Not having the qualiiici
`associated with active, living organisms; not animate
`-—in-an’i-mate-ness n.
`'
`
`occlusion.
`
`in‘a-ni-tion {in’a—nish’an) ii. Exhaustion, as from lack
`of nourishment or Vitality.
`in-ap»pe-tence (inuapfietans) 71. Lack of desire of ap.
`petite. iin-ap’pe-tent adj.
`3
`in-ar-tic-u-late (in’ar-tik’ya—lit) adj. 1. Uttered without
`the use of normal words or syllables; incomprehensible
`as speech or language. 2. Unable to speak; speechim
`3. Unable to speak with clarity or eloquence.
`4. Not
`having joints or segments. —in'ar-tic’u-late-ness, in'-
`ar-tic’u-la-cy (-19-56) 11.
`-
`in-as-sim-i-Ia-ble (in’a—simla—la-bal) adj. Not Capable
`of being utilized for the nutrition of the body.
`in-born (in’born’) adj. 1. Possessed by an organism ai
`birth. 2. Inherited or hereditary.
`' inborn error of metabolism it. Any of a group of can.
`genital disorders caused by an inherited defect in a sin.
`gle specific. enzyme that results in a disruption or ab-
`normality in a specific metabolic pathway.
`in-bred (infbrEd’)
`adj.
`1. Produced by inbreeding.
`2. Fixed in the character or disposition as it inherited;
`deep-seated.
`.
`in-breed-ing (in’bre’ding) ii. 1. See homogamy. 2. The
`continued breeding of closely related individuals so as
`to preserve desirable traits in a stock.
`in-car-cer-at-ed (in~kiir’saera’tid) adj. Trapped or con-
`fined, as a hernia.
`incarcerated hernia it. See irreducible hernia.
`in-cest (in’sést’) ii. 1. Sexual relations between persons
`who are so closely related that their marriage is illegalm'
`forbidden by custom. 2. The statutory crime of sexual
`relations with such a near reiative.
`in-ces-tu-ous (inesés’cho‘o-as) adj. 1. Of, involving. 0!
`suggestive of incest. 2. Having committed incest.
`inlci'dence (in’si-dons) n. 1. The extent or rate of oc-
`currence. especially the number of new cases of a dis-
`ease in a population over a period of time.
`2- TIN
`arrival of radiation or a projectile at a surface.
`-—in"
`ci-dent adj.
`in-ciiden-tal parasite (in’si~dénftl) n. A parasite livinil
`on a host other than its normal host.
`incident point it. The point at which alight ray enters in
`optical system.
`in‘ci-sal (in-si’zal) adj. Relating to the cutting edges “l
`the incisor and cuspid teeth.
`‘
`incisal guide angle 11. The angle formed with the hfil'l'
`zontal plane by drawing a line in the sagittal plane‘bf‘
`tween incisal edges of the maxillary and the mandll’ll'
`iar central
`incisors when the teeth are in cenlilC
`
`to extinguish the patient’s anxiety and anxious behav
`ior and replace them with more appropriate responses.
`2. A bursting inward rather than outward.
`im-po-tence (im’pa—tans) or im-po-ten-cy (dense) n.
`1. The quality or condition of being impotent. 2. See
`erectile dysfunction.
`im-po-tent (im’paetant) adj. 1. Incapable of sexual in-
`tercourse, often because of an inability to achieve or
`sustain an erection. 2. Sterile. Used of males.
`
`im-preg-nate (im-prég’nat) v. i. To make pregnant; to
`cause to conceive; inseminate. 2. To fertilize an ovum.
`3. To fill throughout; saturate. mim’preg-naftion ii.
`—im-preglna’tor n.
`im-pres-sion {irnrprésh’an} ii. 1. An effect, a feeling, or
`an image retained as a consequence of experience. 2. A
`mark or indentation made by the pressure of one organ
`on the surface of another. 3. An imprint of the teeth
`and surrounding tissues, formed with a plastic material
`that hardens into a mold for use in making dentures,
`inlays, or plastic models.
`im-pres«sive aphasia (iin—présliv) it. See sensory apha-
`51a.
`
`im-print-ing (im'prin’ting) :VI. A learning process occur~
`ring early in the life of a social animal in which a spe
`cific behavior pattern is established through association
`with a parent or other role model.
`im-pulse (im’piils’) n. 1. A sudden pushing or driv-
`ing force. 2. A sudden wish or urge that prompts an
`unpremeditated act or feeling; an abrupt inclination.
`3. The electrochemical transmission of a signal along
`a nerve fiber that produces an excitatory or inhibitory
`response at a target tissue.
`impulse control disorder ii. Any of various types of
`mental disorders, such as substance abuse and patho—
`logical gambling, characterized by a tendency to gratify
`an irrnnediate desire or impulse regardless of the conse-
`quences to one’s self or to others.
`im-pul-sion {irnepul'shaifl n. An urge to perform cer~
`tain actions without regard for internal or social c011-
`straints.
`
`im-pul-sive (im—pfil’siv) adj. 1. Inclined or tending to
`act on impulse rather than thought. 2. Motivated by
`or resulting from impulse. —im-pulf5ive-ness, im'pul-
`sivfi-ty n.
`inn-pure flutter (im-pyo‘or') n. A mixture of atrial flut—
`ter and fibrillation waves in the electroeardiogram.
`Im-u-ran (im’ya—rén’) A trademark for the drug aza-
`thioprine.
`[MV abbr. intermittent mandatory ventilation
`In The symbol for the element indium.
`in-—1 or iiwor im—or ir— pref. Not: invertebrate. Before l, in-
`is usually assimilated to il-, before r to ir-, and before is,
`in, and p to im—.
`in—2 or il- or im— or ir— pref. In; into; within: intubution.
`Before I, in~ is usually assimilated to il—, before r to irv,
`and before I), m, andp to im—.
`—in stiff. 1. Neutral chemical compound: inuliii. 2. Phar—
`maceutical: rifmupin. 3. Antibiotic: penicillin. 4. Anti—
`gen: tuberculin. 5. Variant of Hine (sense 1).
`in-ac-ti-vate (in—ak’mrvat’) v. 1. To render nonfuncr
`tional. 2. To make quiescent. —in-ac’ti‘va’tion ii.
`
`