beta particleˈbeta ˌparticle noun [countable] technical 
an electron or positron that is sent out by some radioactive substances
an electron or positron that is sent out by some radioactive substances- proficiently
- profile
- profiling
- profit
- profitability
- profitable
- profitably
- profit and loss account
- profiteer
- profiteering
- profiterole
- profitless
- profitlessly
- profit-making
- profit margin
- profit sharing
- profits warning
- profligacy
- profligate
- pro forma
- pro forma invoice
- profound
- profoundly
- Profumo Scandal
- profundity