τρικόρωνος
From LSJ
αἰὼν παῖς ἐστι παίζων, πεσσεύων∙ παιδός η βασιληίη → time is a child playing draughts; the kingship is a child's | a life-time is a child playing, playing checkers: the kingship belongs to a child | a whole human life-time is nothing but a child playing, playing checkers: the kingship belongs to a child | lifetime is a child at play, moving pieces in a game; kingship belongs to the child
English (LSJ)
ον,
A thrice a crow's age, AP11.69 (Lucill.), Alciphr.1.28, AP5.288 (Agath.).