sigmatism

sigmatism [sig-muh-tiz-uh m] ExamplesWord Origin noun

1. defective pronunciation of sibilant sounds.

Origin of sigmatism 1885–90; Greek sigmat-, stem of sígma sigma + -ism Examples from the Web for sigmatism Historical Examples of sigmatism

Sigmatism and parasigmatism and paralambdacism are strongly marked.

The Mind of the Child, Part II

W. Preyer

Word Origin and History for sigmatism n.

1888, “difficulty in pronouncing ‘S,'” from comb. form of sigma + -ism. As “use or recurrence of ‘S'” from 1889.