Abbott-Smith Manual Greek Lexicon
ἑδραῖος (G1476)
3 ** ἑδραῖος , -ον ( ἕδρα , a seat ), [in Sm.: Ps 32 (33):14 , al. ;] sitting, seated . steadfast, firm ; metaph., of moral fixity: I Co 7:37 15:58 , Col 1:23 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain