Nonreduplicated babbling is defined as babbling which contains sequences of different syllables as opposed to repetition of the same syllable over and over, as in reduplicated babbling.

Nonreduplicated babbling, also known as variegated babbling, is a stage in language development during which infants produce sequences of different consonant and vowel sounds that vary in both order and repetition. This type of babbling is thought to be a precursor to the production of first words and the development of language.

Examples of nonreduplicated babbling might include an infant saying "ba da ga" or "ma ma da da." These sounds are produced in a random order, with no repeated syllables. As infants continue to develop their language skills, they will begin to produce more structured sounds and eventually form words.

Nonreduplicated babbling is considered an important milestone in language development and is thought to reflect the infant's increasing ability to control the sounds they produce. It is also believed to play a role in helping infants learn the sound patterns of their native language and develop the ability to recognize and produce words.