BILLION

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MRD stands for:

Motor Racing Developments, see Brabham
Alberto Carnevalli Airport (IATA code), Mérida Airport (Venezuela) , Venezuela

Billion stands for:

Billion , numerical word for the number 1,000,000,000 or 10 ⁹

mrd stands for:

Magar (language) (ISO-639-3 code), language of the Magar (ethnic group) , one of the Magar-Chepang languages in central Nepal
Minimal residual disease, see acute lymphoblastic leukemia