A.thin, slender, κνῆμαι, χείρ, γλῶσσαι, Il.l.c., 5.425, 16.161; “γαστήρ” Nic.Th. 133; narrow, “εἴσοδος” Od.10.90; of ships, Hes.Op.809; φάλαγγες ἀ., opp. βαθύτεραι, X.Lac.11.6, cf. Plu.Crass.23; ἀραιᾷ τροφῇ χρῆσθαι meagre, of diet, Arist.Pol.1335b13.
II. later, of the substance of bodies, of loose texture, opp. πυκνός, Anaximen.I, Meliss.7, Anaxag. 12,15, cf. Emp.104 (Sup.), Thphr.CP2.4.7, etc.; opp. πίων, Arist. Pr.880a38; freq. in Hp., as VM22; “δέρμα” Aph.5.71; “ὀστέον” Art.33; “εἴρια” Mul.1.1; “ὁμίχλη . . νέφους ἀραιοτέρα” Arist.Mu.394a21, cf. Mete. 364b25(Comp.); “σπόγγοι” D.S.3.14.
2. in Tactics,in open order, opp.πυκνός, τὸ ἀραιότατον [διάστημα] Ascl.Tact.4.1, etc.
III. intermittent, “πνεῦμα” Hp.Epid.1.26.ά, β́; ἆσθμα, βήξ, Aret.SD1.11, etc. Adv. “-ῶς” Hp.Nat.Puer.24; of the pulse, Gal.9.444,al.