Literally meaning: “that which observes the temprature”
Origin: Anc Greek
θερμός/thermos(=warm) >θέρω/thero(=to warm, to heat)+ σκοπέω/scopeo(=aim, look at, observe)
The Italian physicist and astromer Galileo Galilei (1564-1642) invented in 1597 a water thermoscope.
The thermoscope was the early type of the thermometer which contained a liquid sensitive to temperature changes without a numerical scale.