double-red blood
n.— «Students can also donate red blood cells only. The process is more intensive and involves taking blood from a donor, extracting the red blood cells and then putting the rest of the blood back into the donor. This process is called double-red blood.» —“Hoxworth takes blood from students” by Thomas Demeropolis in University of Cincinnati News Record (Cincinatti, Ohio) Oct. 19, 2005. (source: Double-Tongued Dictionary)
Further reading
Amid court-ordered busing in the 1970s, a middle-school teacher tried to distract her nervous students on the first day of class with this strange assignment: find a monarch caterpillar. The result? A memorable lesson in the miracle of metamorphosis...
In 1971, when a new public library opened in Troy, Michigan, famous authors and artists were invited to write letters to the city’s youngest readers, extolling the many benefits of libraries. One of the loveliest was from E.B. White, author of...