beta

Beta (UK /ˈbiːtə/ or US /ˈbeɪtə/; uppercase Β, lowercase β; Greek: Βήτα Bḗta) is the second letter of the Greek alphabet. In Ancient Greek, beta represented the voiced bilabial plosive /b/. In Modern Greek, it represents the voiced labiodental fricative /v/.
The letter beta was derived from the Phoenician letter beth . Letters that arose from beta include the Roman letter ⟨B⟩ and the Cyrillic letters ⟨Б⟩ and ⟨В⟩.
In the system of Greek numerals, beta has a value of 2.