|—suffix forming nouns|
|1.||a group or unit (having so many parts or members): triad|
|2.||an epic poem concerning (the subject indicated by the stem): Dunciad|
|[via Latin from Greek -ad- (plural -ades), originally forming adjectives; names of epic poems are all formed on the model of the Iliad]|
|—suffix forming adverbs|
|denoting direction towards a specified part in anatomical descriptions: cephalad|
|[from Latin ad to, towards]|
In the direction of; toward: cephalad.