vaḍḍhanaka : [adj.] increasing; serving in.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Vaḍḍhanaka (adj.) [fr. vaḍḍhana, cp. vaḍḍheti 4] serving, in f. ˚ikā a serving (of food), a dish (bhatta˚) DhA 188 (so read for vaḍḍhinikā).

Pali-English Dictionary, TW Rhys Davids, William Stede,