A surname. / A male given name / A ghost town in California, United States. / A town in Maine, United States. / A census-designated place in Mississippi, United States.

A city in Donetsk Oblast, Ukraine

One of 66 counties in South Dakota, United States. County seat: Kennebec.

(linguistics) A linguistic rule stating that rendaku does not occur if the second element of the compound contains a voiced obstruent in any position, e.g. yama + kaji produces yamakaji (mountain fire), not *yamagaji.

A hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n ≥ 2 to n = 1 (where n is the principal quantum number), the lowest energy level of the electron.

(astronomy) A series of absorption lines in the spectra of distant galaxies and quasars, arising from the Lyman-alpha electron transition of the neutral hydrogen atom.

(astronomy) A large gas cloud (nebula) larger than galaxies, found in intergalactic space, which radiates with an emission spectrum containing 2.47 THz lines (Lyman-alpha lines).