abnormal

[ab-nawr-muhl]
adjective
1.
not normal, average, typical, or usual; deviating from a standard: abnormal powers of concentration; an abnormal amount of snow; abnormal behavior.
2.
extremely or excessively large: abnormal profit.

Origin:
1850–55; ab- + normal; replacing anormal < Medieval Latin anōrmālus, variant of anōmālus anomalous influenced by Latin norma norm

abnormally, adverb
abnormalness, noun
superabnormal, adjective
superabnormally, adverb

abnormal, subnormal.


1. anomalous, aberrant, irregular, deviant, unnatural, odd. See irregular.
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World English Dictionary
abnormal (æbˈnɔːməl)
 
adj
1.  not normal; deviating from the usual or typical; extraordinary
2.  informal odd in behaviour or appearance; strange
 
[C19: ab-1 + normal, replacing earlier anormal from Medieval Latin anormalus, a blend of Late Latin anōmalusanomalous + Latin abnormis departing from a rule]
 
ab'normally
 
adv

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

abnormal
1835, replaced older anormal and abnormous (1742) under influence of L. abnormis "deviating from a rule," from ab- "off, away from" + norma "rule" (see norm). The older forms were via O.Fr. anormal (13c.), from M.L. anormalos, from Gk. anomalos, from an- "not" + homalos, from
homos "same." The Gk. word was altered in Latin by association with norma.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Abnormal gait may be caused by diseases in many different areas of the body.
With the latest grants, researchers will sequence abnormal genes that may help
  cause cancer and other common diseases.
There's nothing abnormal about the recession's causes.
Then researchers spot something abnormal in your head.
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