(~s)
Frequency: The word is one of the 3000 most common words in English.
A ~ is a person who has a particular skill or knows a lot about a particular subject.
...a ~ in diseases of the nervous system.
= expert
N-COUNT: usu N n, n N, N in/on n
(~s)
Frequency: The word is one of the 3000 most common words in English.
A ~ is a person who has a particular skill or knows a lot about a particular subject.
...a ~ in diseases of the nervous system.
= expert
N-COUNT: usu N n, n N, N in/on n
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012