[Meaning] a juror; [named] from the great jurycourt of the Heliaia. It was so named because it was an open-air place struck by the rays of the sun [helios]. Aristophanes [writes]: "no, on the contrary, [non-jurors!]". This has undergone modification. Meaning in the absolutely opposite way; that is, litigation-hater. For by saying ap-Heliast, [he uses a word] in place of litigation-hater; for the country folk [were] no jury-lovers.
Also [sc. attested is] 'phil-Heliast', [meaning] litigation-lover. Aristophanes [writes]: "he is a phil-heliast like no other man".[1]
All Athenians used to swear the ancient Heliastic oath in public.[2]