Definition of lallation in English:

lallation

noun

  • 1[mass noun] Imperfect speech, especially the repetition of meaningless sounds by babies.

    1. 1.1The pronunciation of r as l.

Origin

Mid 17th century: from Latin lallatio(n-), from lallare sing a lullaby.

Pronunciation:

lallation

/laˈleɪʃ(ə)n/