"beta" in the noun sense
1. beta
the 2nd letter of the Greek alphabet
2. Beta, genus Beta
beets
"beta" in the adjective sense
1. beta
second in order of importance
"the candidate, considered a beta male, was perceived to be unable to lead his party to victory"
2. beta
preliminary or testing stage of a software or hardware product
"a beta version"
"beta software"
Source: WordNet® (An amazing lexical database of English)
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