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dys- (iou)



dys- prefix.
[Greek dus-, cogn. with Sanskrit dus-, Old High German zur- (German zer-), Old Norse tor-, Old English TO-2.]
Forming nouns and adjectives with the sense 'bad, difficult, unfavourable, abnormal, impaired' (opp. EU-). In Medicine, often with counterparts of related meaning in A-10.
dy'sarthria noun difficult or unclear articulation of (otherwise normal) speech L19.
dyscal'culia noun severe difficulty in calculation, as a result of cerebral disorder M20.
dyschezia difficult or painful defecation M19.
dyski'nesia noun an abnormality or impairment of voluntary movement E18.
dys'lalia noun a speech disorder, esp. one in which a person uses words or sounds peculiar to himself or herself M19.
dys'phonia noun difficulty in speaking due to a disorder of the throat, mouth, or vocal organs E18.
dys'photic adjective (of ocean depths etc.) receiving insufficient light to bring about photosynthesis E20.
dys'prosody noun abnormality of speech inflection, stress, and rhythm, occurring in aphasia M20.
dys'rhythmia noun an abnormality of physiological rhythm, esp. in the electrical activity of the brain E20.
dys'rhythmic adjective of or pertaining to dysrhythmia M20.
dysteleo'logical adjective of, pertaining to, or marked by dysteleology M19.
dystele'ology noun the denial of final causes or purpose in natural phenomena (opp. TELEOLOGY); biological study conforming to this viewpoint: M19.
dys'thymia noun [Greek dusthumia] Psychiatry depression, despondency M19.
dys'thymic adjective (Psychiatry) of, pertaining to, or suffering from dysthymia M20.