Bible Dictionaries
Lunation

Webster's Dictionary

(n.) The period of a synodic revolution of the moon, or the time from one new moon to the next; varying in length, at different times, from about 29/ to 29/ days, the average length being 29 d., 12h., 44m., 2.9s.

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