sigmatism
noun/ˈsɪɡməˌtɪzəm/
Etymology From sigma + -ism. sigmat- is the stem form of sigma, as seen in sigmatic.
1
A lisp.
2
A defective pronunciation of sibilant sounds.
- The flaw in pronouncing a sibilant S, which speech therapists call sigmatism, can follow even minor changes to the way the tongue aligns with the teeth.2007 October 30, C. Claiborne Ray, “Whence the Whistle?”, in New York Times:
- Derived terms
- parasigmatism