witness mark
n.— «Witness marks on the jack screws that drive the flaps and on other data indicate that Flight 801’s flaps had been placed in the landing setting of 30 deg., according to investigators.» —“Guam Probe Targets Weather, Altitude Alert” by James T. Mckenna Aviation Week & Space Technology Aug. 18, 1997. (source: Double-Tongued Dictionary)
Further reading
Sure, there’s winter, spring, summer, and fall. But the seasons in between have even more poetic names. In Alaska, greenup describes a sudden, dramatic burst of green after a long, dark winter. And there are many, many terms for a cold snap...
Temperature blankets are a visual and tactile mirror of the day’s weather. Knitters use specific shades of yarn to match daily temperatures, creating a colorful, cozy record of weather across time. Plus, a new book chronicles the history and...