Medical Definition of ankyloglossia
: limited normal movement of the tongue chiefly due to an abnormally shortened frenulum : tongue-tie Technically known as ankyloglossia, it is a usually minor birth defect in which a flap of tissue under the tongue, called the frenum or frenulum, is too short or absent.—C. Claiborne Ray, The New York Times, 26 Oct. 2004
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