n. [ L. Junius: cf. F. Juin. So called either from Junius, the name of a Roman gens, or from Juno, the goddess. ] The sixth month of the year, containing thirty days. [ 1913 Webster ]

And what is so rare as a day in June?
Then, if ever, come perfect days. Lowell. [ 1913 Webster ]

June beetle,
June bug (Zool.), any one of several species of large brown beetles of the genus Lachnosterna and related genera; -- so called because they begin to fly, in the northern United States, about the first of June. The larvæ of the June beetles live under ground, and feed upon the roots of grasses and other plants. Called also May bug or May beetle. --
June grass (Bot.), a New England name for Kentucky blue grass. See Blue glass, and Illustration in Appendix. [ 1913 Webster ]

n. A kind of early apple. [ Written also jenneting. ] [ 1913 Webster ]

n. (Bot.) (a) The small applelike berry of American trees of genus Amelanchier; -- also called service berry. (b) The shrub or tree which bears this fruit; -- also called shad bush, and shad tree. [ 1913 Webster ]

n. (Zool.) 1. See june beetle. [ PJC ]

2. A firefly. [ Chiefly Northern U. S. ] [ PJC ]