tick-tacker
n.— «Tick-tackers lasted longer. Usually wearing white gloves for better visibility, tick-tackers conveyed prices from one enclosure to another by hand signals.» —“Randwick’s last tout: nine tips but none the winner” by Max Presnell Sydney Morning Herald (Australia) June 24, 2004. (source: Double-Tongued Dictionary)
Further reading
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...
Janet in Montgomery, Alabama, reports that a day after she had surgery on her hand, the wound burst open, and a doctor noted that her wound dehisced. She’s used to hearing dehisce used in botany to mean the splitting of a plant structure to...