The ~ is something that is in the blood of most people. If someone’s blood contains this factor, they are rhesus positive. If it does not, they are rhesus negative.
= Rh factor
N-SING
The ~ is something that is in the blood of most people. If someone’s blood contains this factor, they are rhesus positive. If it does not, they are rhesus negative.
= Rh factor
N-SING
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012