3.alpha - Wiktionary
From the Ancient Greek ἄλφα (alpha), the first letter of the Greek alphabet, from the ... Alpha (investment) on Wikipedia.Wikipedia:Alpha (investment) ...
-- http://en.wiktionary.org/wiki/alpha
4.Alpha(letter) Alpha (uppercase Α, lowercase α; _el. Αλφα) is the first letter of the Greek alphabet. I the system of Greek umerals it has a value of 1. It was derived ...
-- http://en.academic.ru/dic.nsf/enwiki/208