red-out
n.— «The scope should not be advanced against resistance. “Red-out” is the term used to describe what occurs when the tip of the scope is placed too close to the bowel wall mucosa. In this situation, the reflection of light off the vascularized tissue produces a red haze. By slightly withdrawing the scope, the endoscopist can again obtain a clear view of the bowel wall.» —“Health: Screening for Colorectal Cancer” Ghana News Oct. 9, 2008. (source: Double-Tongued Dictionary)
Further reading
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...
A Vermont listener named Amy is looking for a word to denote a particular kind of light. She has an eye condition that makes her photophobic, which means that ordinary light makes her physically uncomfortable. She wants a word that describes that...