Webster's New World Medical Dictionary

dysphoria
Anxiety.
dysplasia
Abnormality in form or development.
For example, retinal dysplasia is abnormal forma-
tion of the retina during embryonic development.
dysplasia, bronchopulmonary
Chronic lung
disease in infants who have received mechanical
respiratory support with high oxygenation in the
neonatal period.
dysplasia, cleidocranial
See 
cleidocranial
dysostosis.
dysplastic nevus
A mole whose appearance is
different from that of common moles. Dysplastic
nevi are generally larger than ordinary moles, and
they have irregular borders. Their color is often not
uniform. They are usually flat, but parts may be
raised above the skin surface. Dysplastic nevi can be
precancerous. See 
cancer, skin.
dyspnea
Difficult or labored breathing; shortness
of breath. Dyspnea is a sign of serious disease of the
airway, lungs, or heart. The onset of dyspnea should
not be ignored; it is reason to seek medical attention.
dyspnoea
See 
dyspnea.
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dyspnoea
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dyspraxia
Impaired or painful function of an organ
of the body. See also 
developmental dyspraxia.
dyspraxia, developmental
See 
developmental
dyspraxia.
dyspraxia of speech
A developmental disability
characterized by difficulty with muscle control,
specifically with the muscles involved in producing
speech. The cause is unclear. Treatment involves
intensive speech therapy that concentrates on oral-
motor skills. See also apraxia of speech.
dysthymia
A type of depressive disorder that
involves long-term, chronic symptoms that are not
disabling but that nonetheless keep a person from full
function or from feeling good. Dysthymia is a less
severe type of depression than major depression.
However, people with dysthymia may also sometimes
experience major depressive episodes, suggesting that
there is a continuum between dysthymia and major
depression. See also 
depression; depression, major.