octad


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oc·tad

(ok'tad),
1. Synonym(s): octavalent
2. An octavalent element or radical.
[L. octo, eight]

octad

the eight ascospores contained in a fungal ASCUS.
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References in periodicals archive ?
A thoracic spinal cord stimulation implant was done via percutaneous placement of 2 x 8 octad leads (Medtronic Co.) (see (Figure 1)).
Set the octad group ([summation], P,T,A,N,C,G,E,I) as a Protocols CPN, then:
Pasupati, the deity that would make the series an octad, is missing as the result of a textual corruption.
Thus, writers after Gregory could draw on three traditions to attack avarice: "the Deadly Sins; the octad of Capital Vices; and the Gregorian heptad, in effect a synthesis of both" (106).
In addition, as Allen Forte suggests, octatonically aware composers frequently seem to have regarded seven pitch classes of the collection as 'surrogate' for the full octad.(5) Forte justifies this tendency in terms of set theory, but for present purposes we need note only that, when placed in close position, all seven-element subsets of the collection delineate the first seven degrees of either a 'harmony' or a 'melody' scale and hence strongly imply completion by their missing eighth member.
As pointed out at the beginning of this article, Tonnet's identifications of the eight deities do not conform to any known octad of Brahmanic or Saiva divinities, nor to any specific iconographic master plan.