neuter accusative singular of tatiya (adjective: ordinal number)
Etymology. From the numeral base ta- (three), with ordinal suffix -iya; cognate with Sanskrit tṛtīya, Latin tertius, English third — all from the Indo-European root *trei "three".
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
Lite mode — plain HTML for e-readers and old browsers. Full version