For uṣas is substituted uṣāsā in a devatā - dvanda samāsa,
Thus:- उषासासूर्यम्, उषासानक्ता ॥,
उषासा-उषसः
Adhyāya 6 · Pāda 3 · Rule 31
Adhyāya 6 · Pāda 3 · Rule 31
For uṣas is substituted uṣāsā in a devatā - dvanda samāsa,
Thus:- उषासासूर्यम्, उषासानक्ता ॥,