pH scale

Từ điển WordNet v3.1 - WordNet Dictionary

noun

(from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter;
provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic)
• Syn:
pH
• Topics:
chemistry, chemical science
• Hypernyms:
hydrogen ion concentration
• Hyponyms:
acidity, alkalinity, neutrality