lallation

UK: /læˈleɪʃən/ US: (la lā′shən)

WordReference Random House Unabridged Dictionary of American English © 2025

lal•la•tion  (la lā′shən), n. [Phonet.]

1. Phonetics a speech defect in which l is pronounced instead of r, or in which an l- sound is mispronounced. Cf. lambdacism.

• Latin lallā(re) to sing lala or lullaby + -tion
• 1640–50

Collins Concise English Dictionary © HarperCollins Publishers::

lallation / læˈleɪʃən/ noun

1. a defect of speech consisting of the pronunciation of (r) as (l)

Etymology: 17th Century: from Latin lallāre to sing lullaby, of imitative origin