Dictionary Definition ：
Definition[1]
：
geruka : [nt.] red chalk used for colouring.
Source
：
A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]
Definition[2]
：
Geruka (nt.) & gerukā (f.) [Sk. gairika] yellow ochre (Bdhgh suvaṇṇa˚ cp. Sk. kañcana˚ & svarṇa˚), red chalk used as colouring Vin i.203; ii.151; A i.210; Miln 133 (˚cuṇṇa). Freq. in ˚parikamma a coating of red chalk, red colouring Vin ii.117, 151, 172; ˚parikammakata "coated with red colouring" Vin i.48; ii.218.
Source
：
Pali-English Dictionary, TW Rhys Davids, William Stede,
Definition[3]
：
geruka (n.), gerukā (f.): 紅