Rh–negative

Rh–negative /ˌɑɚˌeɪtʃˈnɛgətɪv/ adjective
Rh–negative
/ˌɑɚˌeɪtʃˈnɛgətɪv/
adjective
Britannica Dictionary definition of RH–NEGATIVE
medical
: not having Rh factor in the blood