/ Dictionary / Index A actinodermatitis: Meaning and Definition of Find definitions for: ac•tin•o•der•ma•ti•tis Pronunciation: (ak-tin"ō-dûr"mu-tī'tis, ak"tu-nō-), [key] — n. Pathol. inflammation of the skin caused by sunlight or other radiation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. actinochemistry actinodrome Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language