προσθαφαίρεσις
προσθαφαίρεσις, addition or subtraction as required
προσθαφαίρ-εσις, εως, ἡ, Astron.,
- addition or subtraction as required, Ptol. Alm. 5.2, Vett.Val. 23.33, Procl. Hyp. 3.89, Cat.Cod.Astr. 8(2).129 (pl.).