DICT.TW Dictionary Taiwan
Ad- As a prefix ad- assumes the forms ac-, af-, ag-, al-, an-, ap-, ar-, as-, at-, assimilating the d with the first letter of the word to which ad- is prefixed. It remains unchanged before vowels, and before d, h, j, m, v. Examples: adduce, adhere, adjacent, admit, advent, accord, affect, aggregate, allude, annex, appear, etc. It becomes ac- before qu, as in acquiesce.
◄ ►
ad
n : a public promotion of some product or service [syn: advertisement,
advertizement, advertising, advertizing, advert]
adv : in the Christian era; used before dates after the supposed
year Christ was born; "in AD 200" [syn: A.D., anno
Domini]
A.D.
adv : in the Christian era; used before dates after the supposed
year Christ was born; "in AD 200" [syn: AD, anno
Domini]