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n. Music
A series of four diatonic tones encompassing the interval of a perfect fourth.

[Greek tetrakhordon, from neuter of tetrakhordos, four-stringed : tetra-, tetra- + khordē, string; see gherə- in Indo-European roots.]

tet′ra·chor′dal (-kôr′dl) adj.


(Music, other) (in musical theory, esp of classical Greece) any of several groups of four notes in descending order, in which the first and last notes form a perfect fourth
[C17: from Greek tetrakhordos four-stringed, from tetra- + khordē a string]
ˌtetraˈchordal adj


(ˈtɛ trəˌkɔrd)

a diatonic series of four tones, the first and last separated by a perfect fourth.
[1595–1605; < Greek tetráchordos having four strings. See tetra-, chord1]
tet`ra•chor′dal, adj.
References in periodicals archive ?
Only the gentle breeze compatible with the double tetrachord of Papadiamantopoulos' stanza.
But according to Wierzbicki, only the [0,1,4,6] tetrachord is found in the First Quartet, with the [0,1,3,7] tetrachord--more tonal in its implications, as three of its pitch-classes make up either a major or a minor triad--making its first appearance in the Second String Quartet (1959).
I like to explain the intervals by using the tetrachord system (Figure 1).
In this work he also developed a theory of chromatic progressions (those in which a melody proceeds directly from, say, C-natural to C-sharp), adapting earlier melodic theories to the musical realities of his day, and expounded a theory of modes in plainchant (predecessors of present-day major and minor keys) based on pentachord and tetrachord species (arrays respectively of five and of four consecutive pitches); his doctrine of modes became the basis of later such theories applicable to both plainchant and polyphony.
Scale" here means a succession of notes that is already organized, such as the tetrachord or its derivatives.
This can be replaced by DISJUNCT TETRACHORD, an uncapitalized term from Webster's Third.
Tomlinson, after Foucault, draws a line between resemblance and representation as separate categories: the one betokens an affinity between the madrigalism and the word prompting it; the other, a musical idea that is autonomous, albeit indicative of a certain emotion or thought or state, as, say, a descending tetrachord that, by a consensual decision reached by composers, was widely utilized as an emblem of lament.
Falco also built a tetrachord to make the tuning of harpsichords and organs easier, as will be discussed below.
4) This splits the scale at two main interstices, one after the triad at the fifth, and the other after the first tetrachord at the fourth.
Carter often seems to take the mimetic-expressive model as an uncontested given, the more easily to focus on the elaboration of rhythmic ratios or the deployment of favorite devices such as the all-trichord hexachord or all-interval tetrachord.
A major tetrachord is one symmetric half of a major scale, either "do re mi fa" or "so la ti do.
C tetrachord is embedded in the octatonic scale being used, but D, the dominant of G, never appears); the orchestral writing is purely octatonic.