chalazion n.

small tumor in the eyelid, 1708, from Latinized form of Greek khalazion, diminutive of khalaza "hail, hailstone; small lump or knot; pimple," from PIE root *gheled- "hail" (source also of Persian žala "hail," Polish złod "glaze," Russian oželedica "glazed frost, fringe of ice on snow"). Related: Chalaza; chalazal.