cryostat

cryo·stat

noun \ˈkrī-ə-ˌstat\

Definition of CRYOSTAT

: an apparatus for maintaining a constant low temperature especially below 0°C (as by means of liquid helium); especially : one containing a microtome for obtaining sections of frozen tissue

—cryo·stat·ic \ˌkrī-ə-ˈstat-ik\ adjective