witness mark
n.— «Will there be a witness marks for the entire length of ground from the other runway to the other? Are you going to do the documenting of that?…Our team is documenting everything from the runway all the way to the final rest. And there are a number of witness marks. Whether it’s tree strikes, ground scars, they’re looking at all of that.» —“ABC News Now/Special Report” ABC News Aug. 26, 2006. (source: Double-Tongued Dictionary)
Further reading
Mary Beth in Greenville, South Carolina, wonders: Why do we say four-oh-nine for the number 409 instead of four-zero-nine or four-aught-nine? What are the rules for saying either zero or oh or aught or ought to indicate that arithmetical symbol...