beta
UK[ˈbiːtə]US[ˈbeɪtə]
n
The second letter of the Greek alphabet (Β, β)
n
A measure of the risk associated with a stock or investment portfolio in comparison to the market as a whole
n
A version of a product, especially software, that is nearly complete but still being tested before its official release
Etymology
The word 'beta' entered English in the 14th century via Latin, which borrowed it directly from Greek 'βῆτα' (bēta), the name of the second letter of the Greek alphabet. The Greek letter name itself is likely of Semitic origin, derived from the Phoenician letter 'beth', meaning 'house'. This etymological path illustrates a common pattern where the names of letters, fundamental units of writing systems, are preserved across languages through cultural contact. In modern English, the term has evolved beyond its alphabetic origin to acquire specialized meanings in finance and technology, metaphorically extending the idea of 'second' to denote secondary testing phases or comparative risk measurements.
Analysis
The word is a direct loan from the Greek letter name 'βῆτα' (bēta). It is not productively segmented into smaller meaningful parts in English.
Examples
Alpha and beta are the first two letters of the Greek alphabet.
The stock has a high beta, meaning it's more volatile than the overall market.
The app is currently in beta, so users might encounter some bugs.