ἀραί-ωσις,εως,ἡ,
A. becomingormaking porous, rarefaction,opp.πύκνωσις,dub. in Epicur. Nat. 14
Fr. 11 (cf. Fr. 6 ), cf. Plu. Strom. 3 , D.L. 9.8 ( Heraclit. ), Corn. ND 17 , etc.
2. Medic.,porosity,of the lungs, Hp. Oss. 13 , etc.
3. mordanting,
PHolm. 8.3 .