Hibernation reaction
Depression that tends to occur (and recur) as the days grow shorter in the fall and winter. It is believed that affected persons react adversely to the decreasing amounts of light and the colder temperatures as the fall and winter progress. The hibernation reaction is also known as seasonal affective disorder (SAD), a term that first appeared in print in 1985, and winter depression.

Medical dictionary. 2011.

Look at other dictionaries:

  • Reaction, hibernation — Depression that tends to occur (and recur) as the days grow shorter in the fall and winter. It is believed that affected persons react adversely to the decreasing amounts of light and the colder temperatures as the fall and winter progress. The… …   Medical dictionary

  • SAD (seasonal affective disorder) — Depression that tends to occur (and recur) as the days grow shorter in the fall and winter. It is believed that affected persons react adversely to the decreasing amounts of light and the colder temperatures as the fall and winter progress.… …   Medical dictionary

  • Seasonal affective disorder (SAD) — Depression that tends to occur (and recur) as the days grow shorter in the fall and winter. It is believed that affected persons react adversely to the decreasing amounts of light and the colder temperatures as the fall and winter progress.… …   Medical dictionary

  • dormancy — /dawr meuhn see/, n. the state of being dormant. [1780 90; DORM(ANT) + ANCY] * * * ▪ biology Introduction       state of reduced metabolic activity adopted by many organisms under conditions of environmental stress or, often, as in winter, when… …   Universalium

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