• (n.) An iodine compound obtained as a yellowish gray, odorless, tasteless powder by the action of iodine on phenolphthalein.
Nos'o·phen noun [ Nose + phenol ; orig. used for affections of the nose.] (Pharm.) An iodine compound obtained as a yellowish gray, odorless, tasteless powder by the action of iodine on phenolphthalein.