I. noun
Etymology: beta (I)
: an electron or positron emitted by the nucleus of an atom during radioactive decay
II. noun
: a high-speed electron or positron
I. noun
Etymology: beta (I)
: an electron or positron emitted by the nucleus of an atom during radioactive decay
II. noun
: a high-speed electron or positron
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012