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1. A sudden outburst of emotion or action: a paroxysm of laughter.
a. A sudden attack, recurrence, or intensification of a disease.
b. A spasm or fit; a convulsion.

[Middle English paroxism, periodic attack of a disease, from Medieval Latin paroxysmus, from Greek paroxusmos, from paroxūnein, to stimulate, irritate : para-, intensive pref.; see para-1 + oxūnein, to goad, sharpen (from oxus, sharp; see ak- in Indo-European roots).]

par′ox·ys′mal (-ək-sĭz′məl) adj.
par′ox·ys′mal·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.paroxysmal - accompanied by or of the nature of paroxysms
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


adj paroxístico
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
[USPRwire, Tue Nov 04 2014] Global Markets Direct's, 'Paroxysmal Nocturnal Hemoglobinuria - Pipeline Review, H2 2014', provides an overview of the Paroxysmal Nocturnal Hemoglobinuria's therapeutic pipeline.
AF may be classified as paroxysmal, persistent or permanent, based on the duration of episodes.
The event at Banney Royd raised cash for treatment of Paroxysmal Nocturnal Haemoglobinuria (PNH) at St James's Hospital, Leeds.
Benign paroxysmal positional vertigo (BPPV) is characterized by mechanical dysfunction of the vestibular system in the inner ear.
Patients with paroxysmal AF were less likely to receive oral anticoagulation compared to patients with permanent AF.
These symptoms, called migraine equivalents, include benign paroxysmal torticollis (episodes of uncontrollable neck twisting) of infancy, benign paroxysmal vertigo of infancy, abdominal pain, cyclic vomiting, aura without migraine, and confusional migraine.
In the 4-month- to 9-year-old age group, the cough becomes more paroxysmal. The key indicators of pertussis in this age group, according to the Global Pertussis Initiative algorithm, are worsening paroxysmal nonproductive cough of at least 7 days' duration in an afebrile child with nonpurulent coryza.
Lesley Loeliger, from Glasgow, was given 10 years to live after being diagnosed with bone marrow disease paroxysmal nocturnal haemoglobinuria.
Thus, 30 patients with psychomotor retardation, 23 subjects with a psycho-speech disorder, 28 children with emotional and behavioral disorders (EBD) and 29 examinees with paroxysmal syndrome were included into the groups.
Paroxysmal tonic upgaze of childhood: effect of age-of-onset on prognosis.
The archaeal digoxin produces sodium potassium ATPase inhibition, a paroxysmal depolarisation shift in the neuronal membrane and generates an electromagnetic field of 10-7 Hz oscillation.