Examlex
The formula for the hydronium ion is ______________.
Prelinguistic Vocalizations
Sounds made by infants before they acquire language, such as cooing and babbling.
Babbling
A stage in child language acquisition during which an infant spontaneously utters nonsensical sounds, often combining consonants and vowels, like "ba ba" or "da da."
Cooing
The early vocalization stage of human infancy, where babies produce soft, vowel-like sounds as a precursor to language development.
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