addĭtĭo — Lewis & Short
addĭtĭo, ōnis, f.id.,
I an adding to, addition:
figurarum additio et abjectio,Quint. 9, 3, 18:
Sic corpori fit additio,Cael. Aur. Acut. 2, 37; Prisc. p. 978 P.