-stat, 1. suffix meaning a “device for keeping something stationary”: catheterostat, hysterostat, ophthalmostat. 2. suffix meaning an “instrument for the regulation of” something specified: hemostat, rheostat, thermostat. 3. suffix meaning an “apparatus for the reflection of, in one direction of” something specified: siderostat. 4. suffix meaning a “device for studying in a state of rest”: hydrostat, microstat, orbitostat. 5. suffix meaning an “agent for stopping the growth of”: bacteriostat, mycostat, fungistat.
