Hy'gro·deik noun [ Greek ... wet, moist, and ... to show.] (Physics) A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc. Found on http://www.encyclo.co.uk/webster/H/79
• (n.) A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc. Found on http://thinkexist.com/dictionary/meaning/hygrodeik/