Dear Madhav,
> indicating that the reading of the definition given in the Kavyamala edition is faulty
Surprisingly, the commentary (Mādhuryarañjanīvyākhyā) confirms this fault:
narau nagaṇaragaṇau ro ragaṇaḥ / gau gurudvayam /
I guess that the correct entry in the three volume edition of Apte's dictionary could be taken from Velankar's Jayadāman (Bombay 1949, p. 126):
"nararalaga Rājahaṃsī (6,5) Mm. 9.11, Vibhūṣaṇā Vjs [= Vṛttajātisamuccaya of Vīrahaṅka] 4.94"
By the way, the definition kanakamañjarī naś ca rau lagau is itself written in this meter (na ra ra la ga; caesura after the 6th syllable) - a practice that was probably first introduced by Jayadeva (leaving aside the hardly datable Nāṭyaśāstra).
Best wishes,
Roland Steiner