monomaniac

monomania

[mon-uh-mey-nee-uh, -meyn-yuh]
noun
1.
(no longer in technical use) a psychosis characterized by thoughts confined to one idea or group of ideas.
2.
an inordinate or obsessive zeal for or interest in a single thing, idea, subject, or the like.

Origin:
1815–25; < Neo-Latin; see mono-, -mania

monomaniac [mon-uh-mey-nee-ak] , noun
monomaniacal [mon-uh-muh-nahy-uh-kuhl] , adjective
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World English Dictionary
monomania (ˌmɒnəʊˈmeɪnɪə)
 
n
an excessive mental preoccupation with one thing, idea, etc
 
mono'maniac
 
n, —adj
 
monomaniacal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

monomania
1823, from Mod.L., from Gk. monos "single, alone" + mania. Probably on model of earlier Fr. monomanie. Form of insanity in which the patient is mad on one subject only.

monomaniac
1833, from monomania. Related: Monomaniacal.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

monomania mon·o·ma·ni·a (mŏn'ə-mā'nē-ə, -mān'yə)
n.
Pathological obsession with one idea or subject, as in paranoia.


mon'o·ma'ni·ac' (-mā'nē-āk') n.
mon'o·ma·ni'a·cal (-mə-nī'ə-kəl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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