sylvanite /silˈvə-nīt/

A mineral, telluride of gold and silver

• beta rhythm
• beta rhythms
• betas
• beta test
• beta-test
• beta-tested
• beta-testing
• beta tests
• beta-tests
• beta-thalassaemia
• betatron
• betatrons
• beta wave
• beta waves
• betcha
• bete
• beted
• beteem
• beteeme
• beteemed
• beteemes
• beteeming
• beteems
• betel
• Betelgeuse