1. substance producing condition of no sensation.   dissertation   apogee   anesthetic   alchemy   Hint Half-n-half Clue   2. point on which lever is supported.   fauna   diminution   homeostasis   fulcrum   Half-n-half Clue   3. division into two classes.   alchemy   converse   die   dichotomy   Half-n-half Clue   4. small planet.   asteroid   component   aureole   genesis   Half-n-half Clue   5. opening or gap.   dissection   equinox   aperture   alchemy   Half-n-half Clue   6. botanical garden where trees are studied and exhibited.   floe   homeostasis   arboretum   conduit   Half-n-half Clue   7. tooth of a wheel.   conglomeration   constraint   chassis   cog   Half-n-half Clue