संस्‍कृतशब्‍दकोशः

अन्वष्टका

कृष्णपक्ष की नवमी तिथि

navami of the dark half

Monier–Williams

अन्वष्टका — {anv-aṣṭakā} f. the ninth day in the latter half of the three (or four) months following the full moon in Āgrahāyaṇa, Pausha, Māgha (and Phālguna) Mn. iv, 150