rutherford ruth·er·ford (rŭð'ər-fərd)
A unit expressing the rate of decay of radioactive material, equal to one million disintegrations per second.
Rutherford Ruth·er·ford (rŭð'ər-fərd, rŭth'-), Ernest. First Baron Rutherford of Nelson. 1871-1937.
New Zealand-born British physicist who classified radiation into alpha, beta, and gamma types and discovered the atomic nucleus. He won the 1908 Nobel Prize in chemistry.