Save Gender Masculine & Feminine Usage Vietnamese Pronounced Pron. /tʰin˨˩/, /tʰin˦˩/, /tʰɨn˨˩/ [key·simplify] Meaning & History From Sino-Vietnamese 辰 (thìn) meaning "early morning", also referring to the fifth Earthly Branch (7 AM to 9 AM), which is itself associated with the dragon of the Chinese zodiac.