1. Osadhí.-The morning star, used in describing typical whiteness (odátá, odátavanná, etc.) (D.ii.111), and also great brightness and purity (parisuddha-Osadhátáraká viya) (It.20; MA.ii.638, 772; also Vsm.ii.412).
Buddhaghosa says (MA.ii.714) that it is so called because, when it appears in the sky, people gather medicines and drink them by its sign. (Sukká táraká tassá udayato pattháya tena saññánena osadháni ganhanti pi pivanti pi: tasmá Osadhí táraká ti vuccati.)
The Itivuttaka Commentary (ItA.72) gives another explanation: that it contains bright rays of light, and that it gives efficacy to various medicines (ussanná pabhá etáya dhíyati osadhínam vá anubalappadáyikattá Osadhí).
It is also used in similes to typify constancy, like the star Osadhí, which, in all seasons, keeps to the same path and never deviates there from (sabbautusu attano gamanavíthim vijahitvá aññáya víthiyá na gacchati sakavíthiyá va gacchati). (BuA.89)
2. Osadhí.-The city at the gates of which Anomadassí Buddha performed the Twin-Miracle (BuA.143) and, therefore, a former name of Sankassa.