The temperature scale which measures the melting point of ice at 32° and the boiling point of water at 212°. Noun. 1. Fahrenheit scale - a temperature scale that defines the freezing point of water as 32 degrees and the boiling point of water a 212 degrees. temperature scale - a system of measuring temperature. Translations. n. escala de Fahrenheit, escala de temperatura que usa el punto de congelación a 32° y el de ebullición a 212°.