RHESUS FACTOR
Meaning of RHESUS FACTOR in English
Rhe ‧ sus fac ‧ tor /ˈriːsəs ˌfæktə $ -tər/ BrE AmE noun [singular]
a substance that some people have in their blood
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012