re ‧ ac ‧ tor AC /riˈæktə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ reaction , ↑ reactor , ↑ reactionary , ↑ overreaction ; verb : ↑ react , ↑ overreact ; adjective : ↑ reactionary , ↑ reactive ]
a ↑ nuclear reactor
re ‧ ac ‧ tor AC /riˈæktə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ reaction , ↑ reactor , ↑ reactionary , ↑ overreaction ; verb : ↑ react , ↑ overreact ; adjective : ↑ reactionary , ↑ reactive ]
a ↑ nuclear reactor
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012