diestrus diestrum • diet · · · Info · Definitions · Synonyms · Characters · · diestrus · · Text Latin · · Script 8 · · Length 2 · · Syllables Definitions · · · (noun) (of animals having several estrous cycles in one breeding season) a state or interval of sexual inactivity or quiescence between periods of activity. Synonyms: diestrum. · · Noun Definition 1 Synonyms · · · diestrum · · Synonym 1 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075