thermostatically en · ADV
Etymology
Etymology tree English thermostatic Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al Middle English -ly Middle English -ally English -ally English thermostatically From thermostatic + -ally.
Meanings
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(not-comparable) By means of a thermostat.
[...] the electric fan drive and Drayton regulator temperature control employed on the prototypes have been superseded on the production version by Serck-Behr hydrostatic drive from an engine-driven pump with thermostatically controlled fan speed regulation.
1960 June, “The N.B. Loco. Co. diesel-hydraulic Type "2" locomotive”, in Trains Illustrated, page 345: