Dictionary Definition:
Roga [Vedic roga: ruj (see rujati), cp. Sk. rujā breakage, illness] illness, disease. -- The defn of roga at J ii.437 is "roga rujana -- sabhāvattaŋ." There are many diff. enumerations of rogas and sets of standard combns, of which the foll. may be mentioned. At sn 311 (cp. D iii.75) it is said that in old times there were only 3 diseases, viz. icchā, anasanaŋ, jarā, which gradually, through slaughtering of animals, increased to 98. Bdhgh at SnA 324 hints at these 98 with "cakkhu -- rog' adinā -- bhedena." Beginning with this (cakkhuroga affection of the eye) we have a list of 34 rogas at Nd1 13 (under pākaṭa -- parissayā or open dangers=Nd1 360= Nd2 420) & Nd2 3041 B, viz. cakkhu˚ & the other 4 senses, sīsa˚, kaṇṇa˚, mukha˚, danta˚; kāsa, sāsa, pināsa, ḍāha, jara; kucchiroga, mucchā, pakkhandikā, sūlā, visūcikā; kuṭṭhaŋ, gaṇḍo, kilāso, soso, apamāro; daddu, kaṇḍu, kacchu, rakhasā, vitacchikā, lohita<-> pittaŋ, madhumeho, aŋsā, piḷakā, bhagandalā. This list is followed by list of 10 ābādhas & under "dukkha" goes on with var. other "ills," which however do not make up the number 98. The same list is found at A v.110. The 10 ābādhas (Nd2 3041 C.) occur at A ii.87 & Miln 308 (as āgantuka -- rogā). The 4 "rogas" of the Sun (miln 273, cp. Vin ii.295) are: abbha, mahikā, megha, Rāhu. -- Another mention of roga together with plagues which attack the corn in the field is given at J v.401, viz. visa -- vāta; mūsika -- salabha -- suka -- pāṇaka; setaṭṭhika -- roga etc., i. e. hurtful winds, mice, moths & parrots, mildew. -- The combnroga, gaṇḍa, salla is sometimes found, e. g. M ii.230; Vism 335. Of other single rogas we mention: kucchi˚ (stomach -- ache) J i.243; ahivātaka˚ Vin i.78; Jii.79; iv.200; DhA i.231; paṇḍu˚ jaundice Vin i.206; J ii.102; DhA i.25; tiṇapupphaka˚ hay -- fever Miln 216. -- See also ātanka & ābādha. On roga in similes see J.P.T.S. 1907, 130. <-> D i.11, 73; iii.182; S iii.32; iv.64; A ii.128, 142 sq.; iv.289,; Nd1 486; Vism 236 (as cause of death), 512 (in simile); VbhA 88 (in sim. of dukkha etc.); ThA 288; VvA 6 (rogena phuṭṭha), 75 (sarīre r. uppajji); PvA 86 (kacchu˚), 212 (rogena abhibhūta). -- Opp. aroga health: see sep.
-- ātanka affliction by illness A ii.174 sq.; v.169, 318. -- niḍḍha the nest or seat of disease Dh 148 (cp. DhA iii.110); as ˚nīḷa at It 37. -- mūla the root of disease Sn 530. -- vyasana distress or misfortune of disease D iii.235 (one of the 5 vyasanāni: ñāti˚, bhoga˚, roga˚, sīla˚, diṭṭhi˚); Miln 196 (id.).