Bible Dictionaries
Actinometry

Webster's Dictionary

(1):

(n.) The measurement of the force of solar radiation.

(2):

(n.) The measurement of the chemical or actinic energy of light.

Bibliography Information
Webster, Noah. Entry for 'Actinometry'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​a/actinometry.html. 1828.