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In a language, the smallest unit that carries meaning; may be a word or a part of a word (such as a prefix)
The set of rules by which we derive meaning from morphemes, words, and sentences in a given language; also, the study of meaning.
Beginning at about 4 months, the stage of speech development in which the infant spontaneously utters various sounds at first unrelated to the household language.
The stage in speech development, from about age 1 to 2 during which a child speaks mostly in single words.
Beginning about age 2, the stage in speech development during which a child speaks mostly two-word statements.
Early speech stage in which a child speaks like a telegram - "go car" - using mostly nouns and verbs and omitting auxiliary words.
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