Pronunciation: (ed),[key] —n.Informal. education: a course in driver's ed; adult ed.
Pronunciation: (ed),[key] —n. a male given name, form of Edgar or Edward.
Pharm. effective dose for 50 percent of the group; the amount of a drug that is therapeutic in 50 percent of the persons or animals in which it is tested.
a suffix forming the past tense of weak verbs: he crossed the river.
a suffix forming the past participle of weak verbs (he had crossed the river), and of participial adjectives indicating a condition or quality resulting from the action of the verb (inflated balloons).
a suffix forming adjectives from nouns: bearded; monied; tender-hearted.