áśan m. (connected with √ aś) [only áśnā (instr.) and áśnas, perhaps better derived from áśman, q.v., cf. [Whitney's Gr. section 425e]], stone, rock, [RV. x, 68, 8]
a stone for slinging, missile stone, [RV. ii, 30, 4] and [iv, 28, 5]
([NBD.]) the firmament, [RV. i, 164, 1]; [173, 2]; [x, 27, 15] [in the first two of these three passages the form áśnas has before been taken as nom. sg. m. fr. 1. aśna, q.v.]