Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

-stat

Something that maintains a controlled state.

[Greek statikos, causing to stand.]

Most terms refer to an instrument, such as thermostat, one that automatically regulates temperature; rheostat (Greek rheos, stream), one that controls a current by varying the resistance; humidistat, a device that regulates the humidity of the air in a room or building; cryostat (Greek kruos, frost), one that maintains a very low temperature; haemostat (US hemostat)(Greek haima, blood), an instrument for preventing blood flow by compression of a blood vessel.

Others refer to a substance that controls a system, or a system so controlled, such as chemostat, a system in which the chemical composition is kept at a controlled level, especially for the culture of micro-organisms, or bacteriostat, a substance that stops bacteria multiplying without destroying them. The appestat is the region of the hypothalamus of the brain which is believed to control a person's appetite for food.

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