ṛtvíya mfn. (fr. ṛtú), being in proper time, observing or keeping the proper time, regular, proper, [RV.]; [AV. iii, 20, 1]; [vii, 72, 1]; [VS.]
ṛ́tviya (ṛ́tviya), n. the time after the courses (favourable for procreation), [AV. xii, 3, 29]; [TS. ii, 5, 1, 5.]
&c. See [ib.]