9-Letter Words Containing: OSTAT

• An apparatus for the continuous culture of microorganisms in a steady state

• To keep the concentration of a chemical constant

• a duplicating machine that makes quick positive or negative copies directly on the surface of prepared paper

• a photocopy made on a Photostat machine

• make a copy by means of a Photostat device

• a surgical instrument that stops bleeding by clamping the blood vessel

• a thermostat that operates at very low temperatures

• a thermostat that operates at very high temperatures

• relating to the prostate gland

• A device that includes a plane mirror which turns so as to keep reflecting sunlight toward a predetermined target, compensating for the sun's apparent motions in the sky. The target may be a physical object, distant from the heliostat, or a direction in space, and is almost always stationary relative to the heliostat, so the light is reflected in a fixed direction.