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Noun: estrus  e-strus
Usage: N. Amer (elsewhere: oestrus)
  1. Applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
    - oestrus [Brit], heat, rut

Derived forms: estruses

Type of: physical condition, physiological condition, physiological state

Antonym: anestrus

Encyclopedia: Estrus