- -ad1 [ad, əd]suffix forming nouns:1》 in collective numerals: myriad.2》 in names of females in classical mythology: dryad.3》 in names of poems and similar compositions: Iliad.4》 forming names of members of some taxonomic groupings: bromeliad.Originfrom the Gk ending -as, -ad-.————————-ad2 [əd]suffix forming nouns such as ballad, salad. Compare with -ade2.Originfrom Fr. -ade.
English new terms dictionary. 2014.