LSJ
ον, next the elbow, on the arm, τὰ ἔνδον π. Poll. 2.138 ; cf. παρωλένια· τῶν χειρῶν τὸ ὄπισθεν, Hsch. ; παρωλενίς, ίδος, ἡ, dub.sens. in Demioprata ap. Poll. 10.170.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
neben dem Ellenbogen, Arme, Poll. 2.138 ; nach Hesych. τῶν χειρῶν τὰ ὄπισθεν.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)