Monier-Williams: A Sanskrit-English Dictionary (p. 582)
pathya, mfn. 'belonging to the way', suitable, fit, proper, wholesome, salutary (lit. and fig.; esp. said of diet in a medical sense), Yājñ., MBh., Suśr. &c.; containing elements or leading forms, regular, normal Lāṭy. Nid.; m. Terminalia Chebula or Citrina, L.; N. of a teacher of, AV.; (a), f. a path, way, road (with revatī, 'the auspicious path, personified as a deity of happiness and welfare), RV., TS. Br.; Terminalia Chebula or Citrina and other plants, L.; N. of sev. metres Nid., Col.; N. of a woman, Kathās.; n. a species of salt, L.