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43 Topic Pages Found in Health & Medicine and starting with the letter D
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dairying

business of producing, processing, and distributing milk and milk products. Ninety percent of the world's milk is obtained from cows; the remainder

daylight-saving time

(DST), time observed when clocks and other timepieces are set ahead so that the sun will rise and set later in the day as measured by civil time . The

Open Deafness
Deafness

partial or total lack of hearing. It may be present at birth (congenital) or may be acquired at any age thereafter. A person who cannot detect sound

Decompression sickness

physiological disorder caused by a rapid decrease in atmospheric pressure, resulting in the release of nitrogen bubbles into the body tissues. It is

Dehydration

A fall in the water content of the body. Sixty per cent of a man's body weight is water, and 50 per cent of a woman's; those proportions need to be

Open Dementia
Dementia

An acquired and irreversible deterioration in intellectual function. Around 10 per cent of people aged over 65 and 20 per cent of those aged 75 or

Dengue

Dengue is a mosquito-borne viral infection of mostly tropical and subtropical urban and semiurban areas that causes fever. In the last half of the

dentistry

In the early twentieth century a visit to the dentist was usually for a toothache, cured by extraction or replacement of missing teeth that had

Open Dentition
Dentition

kind, number, and arrangement of the teeth of humans and other animals. During the course of evolution, teeth were derived from bony body scales

Open Depression
Depression

Depression is a word that is regularly misused. Most people experience days or weeks when they feel low and fed up (feelings that may recur), but