Elias in Laramie, Wyoming, says his grandmother used to say Tut, tut to mean No, no. Like tsk, tsk, it’s a sound made between the teeth to show disapproval. Surprisingly, both expressions originally spelled out the same sound but they’ve...
Susan, a dental student in Redlands, California, asks about acetabulum, the anatomical term for the hip socket. It goes back to the Latin acetabulum, a vinegar cup, the small table vessel Romans used for dipping bread. Its cup shape made a natural...