Lunar month
Defined in 4 dictionaries — Ballentine's (1916), Bouvier (1914), Black's (1910), Black's (1891)
Ballentine's Law Dictionary
James A. Ballentine · 1916
The time of a revolution of the moon, 28 days.
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
See Month.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A Dictionary of Law
Henry Campbell Black · 1891
See Monta.