A Dictionary of Linguistics and Phonetics David Crystal

158 downward entailing
generally as ‘register lowering’ or ‘key lowering’. Declination is often used as
an equivalent for downdrift, but this term also has a more general phonetic use
(‘F 0 declination’), referring to a gradual descent of pitch level and narrowing of
pitch range throughout an utterance, partly as a result of reduction in subglottal
air pressure, as speakers use up the breath in their lungs. Such effects, of course,
are not restricted to tone languages.
downward entailing
see entailment
drag chain see chain (3)
drill (n.)
see pattern
drum language In linguistics, a term used to characterize a type of language
in which a drum is used to simulate selected features of speech (primarily, tones
and rhythms). The signals consist mainly of short, formulaic utterances, but
are used to build up quite elaborate systems of communication, especially in
Africa, both within villages and between communities.
D-structure (n.) A term used in later transformational grammar to refer to
an alternative conception of deep structure, which is related to S-structure
(surface structure) by the move alpha rule. D-structure is assumed to be a
pure representation of thematic structure. Since move alpha has not applied,
D-structure can contain (big) pro, but not traces.
dual (adj.)
see number
dualism (n.) A term used to characterize a theory of meaning which postulates
that there is a direct, two-way relationship between linguistic forms and the
entities, states of affairs, etc., to which they refer (i.e. referents). Such dualist
theories are usually contrasted with triadic theories of meaning, which postulate
a threefold relationship, namely between forms, referents and sense.
duality A suggested defining property of human language (contrasting with
the properties of other semiotic systems), which sees languages as being structurally
organized in terms of two abstract levels; also called duality of
patterning or duality of structure. At the first, higher level, language is analysed
in terms of combinations of (meaningful) units (such as morphemes, words);
at another, lower level, it is seen as a sequence of segments which lack any
meaning in themselves, but which combine to form units of meaning. These
two levels are sometimes referred to as articulations – a ‘primary’ and ‘secondary’
articulation respectively.
dummy (adj./n.) A term used in linguistics to refer to a formal grammatical
element introduced into a structure or an analysis to ensure that a
grammatical sentence is produced. Apart from their formal role, dummy elements
have no meaning – they are semantically empty, e.g. there in there were
many people at the club, it in it’s raining. When this element acts as a locus for
grammatical contrasts, it is referred to as a dummy carrier, e.g. do in question