1. English physicist who discovered the pion (the first known meson) which is a subatomic particle involved in holding the nucleus together (1903-1969); [syn: Powell, Cecil Frank Powell]
WordNet (r) 3.0 (2006):
Cecil Frank Powell
n 1: English physicist who discovered the pion (the first known
meson) which is a subatomic particle involved in holding
the nucleus together (1903-1969) [syn: Powell, Cecil
Frank Powell]