διάστασις

διά-στᾰσις, εως, ἡ, ([etym.] διΐστημι)

A parting, separation (opp. ἕνωσις, Dam.Pr.273),

ὀρέων Hdt.7.129

;

ὀστέων Hp.Art.20

, cf. Gal.19.461;

φάραγγες καὶ δ. τῆς γῆς

fissures,

Arist.Mete.350b36

; breach in a barrier, Ph.Bel.98.31; opening,

τῆς γένυος Aret.CD1.3

.

b κεφαλῆς δ. splitting headache, ibid. (pl.), v.l. in Pl.R.407c.

c distension, Arist.PA681b24;

φλεβῶν Aret.SA2.2

.

d δ. κενεή retching, ib. 2.7.

e = διαστολή, of the pulse, Zenoap.Gal.8.736.

f expansion of air, opp. πίλησις, Ph.Bel.77.23.

2 setting at variance,

τοῖς νέοις ἐς τοὺς πρεσβυτέρους Th.6.18

, cf. Plu.Cor.16; cause of breach, Arist.Pol.1303b15.

b contrasting, Pl.R.360e.

3 difference, contrast, Arist.Cael.312a13.

4 disagreement,

δ. ἢ στάσις Pl. Lg.744d

, cf. Arist.Pol.1296a8, 1300b37.

5 divorce, Plu.Aem.5, etc.

II Gramm., of vowels, διαίρεσις κατὰ διάστασιν (as in πάϊς) A.D.Pron.87.4.

b τὰ κατὰ δ. forms written as two words, e.g. ἐμέθεν αὐτῆς ib.114.11.

III interval, Pl.Ti.36a, etc.; in Music, Aristox.Harm.p.4 M., al.; of space, extension, Arist.Top.142b5, al.; dimension,

τὰς αὐτὰς διαστάσεις εἰς βάθος εἰληφός Epicur.Nat.2.7

, cf. Gal.11.503, S.E.M.3.19;

ἡ δ. ἡ τριχῇ

tridimensionality,

Plot.1.2.6

, cf. 6.6.17, Porph.Sent.35, Dam.Pr.375.

IV = διακόσμησις, Antipho Soph.23. (Freq. confused with διάτασις, wh. shd. perh. be read in 1.1.b,c,d.)