heatnounmasculine/ˈsi.u/mediumci·oPortuguesEnglishEspanolFrancaisDefinitionPeriod of sexual receptivity and ovulation in female mammals, characterized by physiological and behavioral changes.The cat is in heat and is very vocal.Dogs usually go into heat twice a year.synheatestrusEtymologyDo latim 'cius', variante de 'cyon'.Related wordsciarcio