Which term describes a child's use of verbal sounds that resemble speech but lack meaning?

The term that best fits a child's use of verbal sounds resembling speech but lacking meaning is jargon. Jargon typically refers to a phase in language development where infants combine various sounds in a way that mimics the rhythm and intonation of speech. However, these sounds do not carry any actual meaning, making them a distinct feature of early verbal communication.

Babbling, for instance, is a stage that precedes jargon, where infants produce repetitive consonant-vowel combinations, eventually converging on meaningful speech. Coos refer to the early vocalizations infants make, primarily consisting of vowel-like sounds, usually made in a contented state. Gibberish implies nonsensical speech that might be produced by older children or adults, usually characterized by a playful or nonsensical manner of speaking but not specifically linked to the developmental stage of a child imitating speech. Hence, jargon accurately captures the phenomenon where speech-like sounds are produced without conveying actual meaning.