airol

from The Century Dictionary.

• noun A greenish-gray, fine, voluminous, odorless, and tasteless powder, said to be an oxyiodide of bismuth subgallate. It is absorbent and antiseptic.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Pharm.), A Trademark A grayish green antiseptic powder, consisting of a basic iodide and gallate of bismuth, sometimes used in place of iodoform.