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Key terms
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daughter languages  Languages developing out of the same parent language; for example, French and Spanish are daughter languages of Latin.
diglossia  The existence of high (formal) and low (familial) dialects of a single language, such as German.
focal vocabulary  A set of words and distinctions that are particularly important to certain groups (those with particular foci of experience or activity), such as types of snow to Eskimos or skiers.
historical linguistics  Subdivision of linguistics that studies languages over time.
kinesics  The study of communication through body movements, stances, gestures, and facial expressions.
lexicon  Vocabulary; a dictionary containing all the morphemes in a language and their meaning.
morphology  The study of form; used in linguistics (the study of morphemes and word construction) and for form in general for example, biomorphology relates to physical form.
phoneme  Significant sound contrast in a language that serves to distinguish meaning, as in minimal pairs.
phonemics  The study of the sound contrasts (phonemes) of a particular language.
phonetics  The study of speech sounds in general; what people actually say in various languages.
phonology  The study of sounds used in speech.
protolanguage  Language ancestral to several daughter languages.
Sapir-Whorf hypothesis  Theory that different languages produce different ways of thinking.
semantics  A language's meaning system.
sociolinguistics  Study of relationships between social and linguistic variation; study of language in its social context.
style shifts  Variations in speech in different contexts.
subgroups  Languages within a taxonomy of related languages that are most closely related.
syntax  The arrangement and order of words in phrases and sentences.







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