■ noun
1》 Physics the minimum amount of fissile material needed to maintain a nuclear chain reaction.
2》 the minimum size or amount of resources required to start or maintain a venture.
■ noun
1》 Physics the minimum amount of fissile material needed to maintain a nuclear chain reaction.
2》 the minimum size or amount of resources required to start or maintain a venture.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004