Canadian Medical Guide > Physical Sciences > Natural Sciences > Time Terms and Definitions

Time

Medical Definition:
Guide Notes:	IM as the abstraction; no qualif; do not confuse with TIME FACTORS, the NIM coord aspect of a given subject; "diurnal" & "nocturnal": consider preferably CIRCADIAN RHYTHM
Also Called:	Longterm Effects

Time Categories.

	Chronology
	Half-Life - The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacologic, physiologic, or radiologic activity.
	Photoperiod - The time period of daily exposure that an organism receives from daylight or artificial light. It is believed that photoperiodic responses may affect the control of energy balance and thermoregulation.
	Time Factors - Elements of limited time intervals, contributing to particular results or situations.

Time Medical Definitions and Terms

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