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octad

English

Etymology

From oct- +? -ad.

Pronunciation

  • (Received Pronunciation) IPA(key): /??ktæd/
  • (General American) IPA(key): /??k?tæd/
  • Hyphenation: oc?tad

Noun

octad (plural octads)

  1. A group of eight things.
    Synonym: octonary
  2. (historical) hundred million = myriad myriad; 100,000,000 = 108 [from 16th c.]

Coordinate terms

  • (group) monad, duad/dyad, triad, tetrad, pentad, hexad, heptad, octad, ennead/nonad, decad/decade, hendecad, dodecad/duodecade, chiliad

Derived terms

  • octadic
  • octad of octads

Related terms

  • octaeteris
  • octennium

octad From the web:

  • octad meaning
  • what is octadecanoic acid
  • what does tetrad mean
  • what is octadecylsilyl silica gel column
  • what is octadecenedioic acid
  • what is octadecane used for
  • what is octadecadienoic acid
  • what is octadecyl mercaptan

octaeteris

English

Etymology

Borrowed from Ancient Greek ?????????? (oktaet?rís, “8-year [period]”).

Noun

octaeteris (plural octaeterides)

  1. An octennium, a period of eight (8) years (chiefly) in the Ancient Greek calendar or in reference to the short lunisolar cycle.

Synonyms

  • octennium (rare)

Related terms

  • (adj.): octaeteric, octennial
  • (19-year lunar cycle): Metonic cycle, enneadecaeteris
  • (eight things): octad

octaeteris From the web:

  • what octane is premium gas
  • what octane is e85
  • what octane is regular gas
  • what octane is jet fuel
  • what octane is ethanol free gas
  • what octane is racing fuel
  • what octane is diesel
  • what octane is aviation fuel
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