Crossword clues for pentad
The Collaborative International Dictionary
Pentad \Pen"tad\, a. (Chem.) Having the valence of a pentad.
Pentad \Pen"tad\, n. [Gr. ?, ?, a body of five, fr. ? five.] (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.
Douglas Harper's Etymology Dictionary
1650s, from Greek pentas (genitive pentados) "group of five" (see five). Meaning "period of five years" is from 1880; meaning "period of five days" is from 1906, originally in meteorology.
n. 1 a group or series of five things 2 (context chemistry English) 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.
Pentad may refer to:
- the number five, 5 (number)
- a series of five years (Aristotle 1857: the decade is composed ... of two pentads), like the lustrum
- 72 pentads in East Asia calendars, the solar term
- Kenneth Burke's method of analyzing motivation, the dramatistic pentad
- Pentachord, a five note chord
Usage examples of "pentad".
Moreover, intelligence data from Sodeskaya quoted the League Emperor as stating that his decision as to whether the operation should take place during the Standard Month of Nonad or be delayed until next Pentad would be made after his Attack Forces had carried out more powerful forays against the Avalonian Home Planets.
He threw open the shutters and saw that three pentads of the garrison, in black-resin armor ridged like the carapaces of sexton beetles and kilts of red leather strips, and with burnished metal caps on their heads, were climbing onto their horses.