Merriam-Webster Collegiate Dictionary - hygienic

 adjective  Date: 1833  1.  a. of or relating to hygiene  b. having or showing good hygiene ~ conditions  2.  a. antiseptic 3c sweetly ~ production…comic in an entirely innocuous way — J. W. Aldridge  b. antiseptic 4 a ~ view of national realities and moral imperatives — I. L. Horowitz  • ~ally adverb