elem.7.def.7

An odd number is that which is not divisible into two equal parts, or that which differs by an unit from an even number.

Περισσὸς δὲ ὁ μὴ διαιρούμενος δίχα ἢ [ ὁ ] μονάδι διαφέρων ἀρτίου ἀριθμοῦ.