- (electrodynamics) The fine structure constant.
- (classical mechanics) Represents angular acceleration.
- See Wikipedia article on angular acceleration for usage.
- (chemistry) Used in chemical nomenclature.
- α-lactam has a three-membered ring structure.
- (astronomy) Used to identify some bright star, usually the brightest star, of a constellation, for instance α-Centauri.
- (topology) Alexandroff compactification
- alpha (for names of this symbol in other language)
Derived from its Ancient Greek majuscule counterpart Α (A, “Alpha”), in turn from the Phoenician letter 𐤀 (“aleph”).
α • (a) (lower case, upper case Α)
- Lower-case άλφα (álfa, “alpha”), the first letter of the modern Greek alphabet. Represents the open front unrounded vowel: /a/.
- Ancient Greek, however, did not distinguish between upper case and lower case. See Α (A) for details.
- α' (a', “one, 1”)
- ,α (,a, “one thousand, 1,000”)
α! • (a!)
- ah!, aah! (expressing emotion)