Abbott-Smith Manual Greek Lexicon
ψηλαφάω (G5584)
4 ψηλαφάω , -ῶ ( ψάω , to touch), [in LXX for מוּשׁ , משׁשׁ pi., etc. ;] to feel or grope about ; c. acc, to feel about for, search after : metaph., of seeking God, Ac 17:27 . to feel, touch, handle : c. acc. pers., Lk 24:39 , I Jo 1:1 ; προσεληλύθατε ψηλαφωμένῳ ( ὄρει ?), He 12:18 (R, txt., a mount that might be touched ; mg., a palpable and kindled fire ; v. Westc., in l.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain