One of 83 counties in Michigan, United States. County seat: Alpena.

A town in Boone County and Carroll County, Arkansas, United States. / A city, the county seat of Alpena County, Michigan, United States.

plural of alpine start

A mountaineer's early start on climbing in the morning, before it is light.

In sign language, a series of signs made with the fingers to indicate letters of the alphabet.

Diphasiastrum alpinum, a club moss in the family Lycopodiaceae.

plural of Alper

(US, slang) Behaviour characteristic of an alpha dog; crassly dominant behaviour, especially at the expense of another male.

plural of alpine skier

(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).