baby talk
Definition - The traditional term for the style of speech used by people when they are speaking to babies. It consists, for example, of short sentences, repetition, and a simplied vocabulary, and it is usually delivered with a high-pitched, cooing intonation.

1. The more politically-correct and scientific-sounding term child-directed speech is replacing it amongst child-care professionals and academics.

Example -
Baby want drinky? Oopsie!

Oxford English Dictionary -
The term's first citation is from 1836:
"A baby…[is] such an interruption…to any conversation but *baby-talk."
(F. A. Kemble Let. 1 Mar. in Rec. of Later Life (1882) I. 43)

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