attharaka : [m.] one who spreads over. || atthāraka (m.), one who spreads out.

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

Attharaka [= atthara] a covering J i.9; DA i.87. -- f. ˚ikā a layer J i.9; v.280.

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