lambdacism
noun
lamb·da·cism
| \ ˈlam-də-ˌsiz-əm
\
\
Medical Definition of lambdacism
1
: excessive use of the letter l or the sound \l\ (as in alliteration)
2
: a defective articulation of \l\, the substitution of other sounds for it, or the substitution of \l\ for another sound — compare lallation sense 2, paralambdacism