(~s)
A ~ is a small glass tube with a hollow rubber part on one end which you use for drawing up and dropping small amounts of liquid.
N-COUNT
(~s)
A ~ is a small glass tube with a hollow rubber part on one end which you use for drawing up and dropping small amounts of liquid.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012