\Re*place"a*ble\ (r?-pl?s"?-b'l), a. 1. Capable or admitting of being put back into a place. 2. Admitting of having its place supplied by a like thing or an equivalent; as, the lost book is replaceable. 3. (Chem.) Capable of being replaced (by), or of being exchanged (for); as, the hydrogen of acids is replaceable by metals or by basic radicals.