Alpha symbol in Greek alphabet with unicode and html entity codes. Copy paste or learn how to type capital and small letter alpha symbol on mac and win PC. This post will teach you a lot about the Alpha Symbol . First, we’ll look at its meaning, HTML, CSS, and Alt codes, Copy & Paste button, then the steps you may take to type this symbol text on your keyboard,... The ' α ' is a letter of the Greek alphabet. In mathematics, physics, and engineering, it is often used to denote an angle, a coefficient of thermal expansion, an alpha particle, among other uses. Learn about the Greek letter Alpha ( α ), its pronunciation, usage examples, and common applications in mathematics, science, and engineering.