Definition of "lingua"

Let your lingua loiter on its salty, hard surface. When you finally crack the nut, don’t swallow it right away.

2009, Alex J. Packer, Wise Highs: How to Thrill, Chill, & Get Away from It All Without Alcohol Or Other Drugs, Read How You Want, page 24

“I believe it’s from the condition he’s acquired,” she answered while moving closer to examine the elongated lingua. “You can put it back in your mouth now.”

2016, E.B. Mendel, If Frogs Could Fly, Sunbridge Books