Webster's New World Medical Dictionary

Horner ptosis
See 
Horner syndrome.
Horner syndrome
A condition resulting from
interruption of the sympathetic nerve pathways to
the eye, resulting in the drooping of the upper eye-
lid on one same side (ptosis), the constriction of
the pupil of that eye (miosis), and with the lack of
sweating (anhidosis) and flushing of the affected
side of the face. Also known as Horner-Bernard syn-
drome, Bernard syndrome, Bernard-Horner syn-
drome, and Horner ptosis.
hornet sting
A sting from a hornet, which can
trigger an allergic reaction of varying severity.
Avoidance and prompt treatment are essential. For
those with severe reactions, injectable epinephrine
should always be kept on hand. In selected cases,
allergy injection therapy is highly effective.
horripilation
See 
goose bumps.
hospice
A program or facility that provides spe-
cial care for people who are near the end of life and
for their families. Hospice care can be provided at
home, in a hospice or other freestanding facility, or
within a hospital.
hospital
A place for receiving medical or surgi-
cal care, usually as an inpatient (resident). An ill
person in the US may be “in the hospital,” and his
ailing UK counterpart would say he is “in hospital.”
hospitalist
A hospital-based general physician.
Hospitalists assume the care of hospitalized patients
in the place of patients’ primary care physicians. In
the most prevalent US model of hospitalist care, sev-
eral physicians practice together as a group and
work full time to care for inpatients.
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hot flash
A sudden wave of mild or intense body
heat caused by a rush of hormones. Hot flashes
result from blood vessels opening and constricting,
an action that is triggered by hormonal changes
caused by decreased levels of estrogen. They can
occur at any time and may last from a few seconds
to a half hour. Hot flashes are a symptom of the
perimenopause.