[ free-nuhm ]

noun,plural fre·na [free-nuh]. /ˈfri nə/. Anatomy, Zoology.
  1. a fold of membrane that checks or restrains the motion of a part, such as the fold on the underside of the tongue.

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Origin of frenum

First recorded in 1655–65; New Latin, from Latin fraenum, frēnum “bridle, restraint,” of disputed origin

Words Nearby frenum Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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British Dictionary definitions for frenum


/ (ˈfriːnəm) /

nounplural -na (-nə)
  1. a variant spelling (esp US) of fraenum

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012