imˈmune ˌsystem BrE AmE noun [countable]
the system by which your body protects itself against disease:
My immune system is not as strong as it ought to be.
imˈmune ˌsystem BrE AmE noun [countable]
the system by which your body protects itself against disease:
My immune system is not as strong as it ought to be.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012