Bailly
ᾶς (ἡ) v. πολιός.
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LSJ
ἡ, greyness of hair, Men. Mon. 705; as a disease, Arist. GA 784b13, Pr. 894b9, Fr. 235; σεμνὴ π. LXX 4 Ma. 7.15, cf. Plu. 2.4ib, Chor. p. 15B., al. ; πολιή σε κατεύνασε AP 5.219 (Agath.); concrete, πολλῆς μὲν νεότητος, πολλῆς δὲ πολιᾶς εἰσιούσης Chor. in Lib. 4.516R.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
grayness of hair (MT)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars