discordant couple
n.— «The physician who performed the inseminations reported that in January 1990 a second HIV-1-discordant couple (i.e., seropositive husband with hemophilia, sero negative wife) underwent one insemination using the same density gradient centrifugation procedure. Nine weeks after the insemination, the woman was negative for HIV-1 antibody by EIA and Western blot and for proviral HIV-1 DNA by polymerase chain reaction.» —“Morbidity and Mortality Weekly Report” USA Today/Gannett Nat. Info. Network Apr. 22, 1990. (source: Double-Tongued Dictionary)
Further reading
Twice a day the River Thames recedes, revealing a muddy shoreline. Hobbyists known as mudlarks stroll the surface searching for objects that have found their way into the river over the centuries, everything from ancient Roman jewelry to modern...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...