Dormant

Definition

In a temporarily inactive physiological state characterized by reduced metabolic rate, arrested development, or suppressed activity, typically as an adaptive response to unfavorable environmental conditions such as cold, heat, desiccation, or resource scarcity. Dormancy represents a reversible suspension of normal life processes, distinct from death or permanent inactivity, and is terminated when conditions become favorable.

Etymology

Latin dormire, to sleep

Example

Many temperate insects enter a dormant state as diapausing pupae or adults during winter, with metabolism dropping to 10% or less of active levels; the emerald ash borer (Agrilus planipennis) can remain dormant under bark for extended periods, complicating detection and management efforts.

Synonyms

• quiescent
• inactive (physiologically)

Related Terms

• Diapause
• Quiescence
• Aestivation
• hibernation
• Cryptobiosis
• anhydrobiosis
• torpor
• latency

Usage Notes

Dormant is the broader, more general term for any inactive state; specialists distinguish diapause (programmed, hormonally regulated dormancy) from quiescence (direct, immediate response to adverse conditions). In arachnology, 'dormant' may describe overwintering spiders or mites in refugia. The term is sometimes used loosely in pest management to describe any non-feeding, non-reproductive stage, but physiologists reserve it for metabolically depressed states. Contrast with 'latent' (implying hidden potential rather than suppressed activity) and 'dead' (irreversible cessation).