octaval


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oc·tave

 (ŏk′tĭv, -tāv′)
n.
1. Music
a. The interval of eight diatonic degrees between two tones of the same name, the higher of which has twice as many vibrations per second as the lower.
b. A tone that is eight diatonic degrees above or below another given tone.
c. Two tones eight diatonic degrees apart that are sounded together.
d. The consonance that results when two tones eight diatonic degrees apart are sounded.
e. A series of tones included within this interval or the keys of an instrument that produce such a series.
f. An organ stop that produces tones an octave above those usually produced by the keys played.
g. The interval between any two frequencies having a ratio of 2 to 1.
2. Ecclesiastical
a. The eighth day after a feast day, counting the feast day as one.
b. The entire period between a feast day and the eighth day following it.
3. A group or series of eight.
4.
a. A group of eight lines of poetry, especially the first eight lines of a Petrarchan sonnet. Also called octet.
b. A poem or stanza containing eight lines.
5. Sports A rotating parry in fencing.

[Middle English, eighth day after a feast day, from Old French, from Medieval Latin octāva (diēs), from Latin, feminine of octāvus, eighth, from octō, eight; see oktō(u) in Indo-European roots.]

oc·ta′val (ŏk-tā′vəl, ŏk′tə-vəl) adj.

octaval

(ɒkˈteɪvəl)
adj
1. (Units) relating to an octave or progressing by means of groups of eight
2. (Classical Music) relating to an octave or progressing by means of groups of eight
References in periodicals archive ?
8th tergite without octaval, weakly sclerotized; 8th sternite with octavals, strongly sclerotized.
So far, no researcher with the exception of Hans Kayser, the German author of Harmonia Planatarum and other mathematically learned books on the relation of sound intervals to the growth of plants, seems to have become interested in the octaval correspondences between the shapes of plants and musical notes.
At this point attention should be paid to the octaval structure and alternating rhyme scheme of the poem's two stanzas, understanding that both stanzas employ these structures for contrasting semantic purposes.