| 1. | Also, hygienics. the science that deals with the preservation of health. |
| 2. | a condition or practice conducive to the preservation of health, as cleanliness. |
(téchnē) healthful (art), fem. of hygieinós healthful, equiv. to hygi
(s) healthy + -inos -ine 1 
hygiene hy·giene (hī'jēn')
n.
The science that deals with the promotion and preservation of health. Also called hygienics.
The conditions and practices that serve to promote or preserve health, as those followed for personal hygiene.