Ἡλιαία

French (Bailly abrégé)

ας (ἡ) :
1 la place Hèliæa, où siégeait le tribunal des Héliastes, à Athènes;
2 le tribunal lui-même.
Étymologie: cf. ἁλής, ἁλίζομαι.

Russian (Dvoretsky)

Ἡλιαία: ἡ Гелиея (площадь в Афинах, на которой происходили заседания суда гелиастов) Arph., Arst.

English Wikipedia

Heliaia or Heliaea (Ancient Greek: Ἡλιαία; Doric: Ἁλία Halia) was the supreme court of ancient Athens. Τhe view generally held among scholars is that the court drew its name from the ancient Greek verb ἡλιάζεσθαι, which means συναθροίζεσθαι, namely congregate.[α] Another version is that the court took its name from the fact that the hearings were taking place outdoors, under the sun.[β] Initially, this was the name of the place where the hearings were convoked, but later this appellation included the court as well.

The judges were called heliasts (ἡλιασταί) or dikasts (δικασταί, ὀμωμοκότες = those who have sworn, namely the jurors). The operation of judging was called ἡλιάζεσθαι (δικάζειν).