ἀρνειός

A. ram, wether ( = τριετὴς κριός, Hsch.), Il. 2.550, al., Ister 53; ἀ. ὄϊς, opp. θῆλυς, Od. 10.572,al.; but later, θῆλυς ἀ. A.R. 3.1033.
2. the constellation Aries, Max. 72. (Orig. ἀρνηός, cf. ἀρνηάς and Att. ἀρνεώς. Deriv. of ἄρσην, as ἀρσν‐ηv‐ό‐ς, cf. ἀρνευ‐τήρ. No initial v‐.)
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project