— additamentary /euh dit'euh men"teuh ree/ , adj.
/euh dit"euh meuhnt/ , n.
something added; an addition.
[ 1400-50; late ME additamentum, equiv. to addit ( us ) (ptp.) added (see ADDITION) + -a- (by analogy with verbal derivatives such as ornamentum ORNAMENT) + -mentum -MENT ]