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addaword.gifdefinition of heliostat

noun
a mirror that tracks the sun, usually in order to concentrate solar power for electricity generation
STS offers progressive and high efficient heliostats, based on own patent pending technology tailored to customers requirements.
Submitted from United Kingdom on 07/11/2013 11:31:00
Definition of heliostat from the Open Dictionary – a public resource hosted by Macmillan English Dictionary Online

dark pool

a method of financial trading in which share prices are hidden and not openly available to the public

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bottom gear

the gear that you use for driving a vehicle very slowly