PENTAD • E-FREE TRANSLATION.COM • Definition of Pentad

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noun

Pentad n. (Chem.)

Any element, atom, or radical, having a valence of five, or which can be combined with, substituted for, or compared with, five atoms of hydrogen or other monad; as, nitrogen is a pentad in the ammonium compounds.

Any grouping of five things.

adjective

Pentad adj. (Chem.) Having the valence of a pentad.

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Etymology of 'Pentad'

Collaborative International Dictionary of English 0.48

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"Pentad" Quotes from Famous Books

... quoted above, 'Therefore some call him the twenty-sixth, and others the twenty-seventh.' The 'even' in the Sutra is meant to intimate that the 'five five-people' can in no way mean the twenty-five categories, since there is no pentad of groups consisting of five each. For in the case of the categories of the Sankhyas there are no generic characteristics or the like which could determine the arrangement of those categories in fives. Nor must it be urged against this that there is a ...

— The Vedanta-Sutras with the Commentary by Ramanuja - Sacred Books of the East, Volume 48 • Trans. George Thibaut

... five of these unearthly Buddhas were formed into a pentad and described as Jinas[74] or Dhyani Buddhas (Buddhas of contemplation), namely, Vairocana, Akshobhya, Ratnasambhava, Amitabha and Amoghasiddhi. In the fully developed form of this doctrine these five personages are produced by contemplation from the Adi-Buddha or original Buddha spirit and ...

— Hinduism And Buddhism, Volume II. (of 3) - An Historical Sketch • Charles Eliot