regulus regulize • regulus calendula · · · Info · Definitions · Characters · · regulus · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) the brightest star in Leo. Synonyms: Regulus. · · Noun Definition 1 (noun) a genus of birds of the family Sylviidae including kinglets. Synonyms: Regulus, genus Regulus. · · Noun Definition 2 Characters · · e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075