pentad

[ pen-tad ]

/ ˈpɛn tæd /

SEE SYNONYMS FOR pentad ON THESAURUS.COM

noun

a period of five years.

a group of five.

the number five.

Chemistry. a pentavalent element or group.

Climatology. a period of five consecutive days.

Origin of pentad

First recorded in 1645–55; from Greek pentad- (stem of pentás ) group of five; see origin at pent-, -ad¹

Words nearby pentad

pent, penta-, pentachloronitrobenzene, pentachlorophenol, pentacle, pentad, pentadactyl, pentadecagon, pentaerythritol, pentaerythritol tetranitrate, pentagon

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for pentad

Nitrogen in the triad condition in the amines is far less poisonous than in the pentad condition.
Poisons: Their Effects and Detection|Alexander Wynter Blyth
Five, or the pentad, is everything; it stops the power of poisons, and is dreaded by evil spirits.
Three Thousand Years of Mental Healing|George Barton Cutten
There is something to be said for this view, but on the whole the balance of the evidence is in favor of nitrogen being a pentad.
Scientific American Supplement, No. 324, March 18, 1882|Various
But this oddness belongs to other numbers also (pentad, heptad, &c.).
Aristotle|George Grote

In 1820, he added to the last a pentad, so that the whole list amounted to sixty-five.
Man and His Migrations|R. G. (Robert Gordon) Latham

British Dictionary definitions for pentad

pentad

/ (ˈpɛntæd) /

noun

a group or series of five

the number or sum of five

a period of five years

chem a pentavalent element, atom, or radical

meteorol a period of five days

Word Origin for pentad

C17: from Greek pentas group of five

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

单词	pentad
释义	pentad [ pen-tad ] / ˈpɛn tæd / SEE SYNONYMS FOR pentad ON THESAURUS.COM noun a period of five years. a group of five. the number five. Chemistry. a pentavalent element or group. Climatology. a period of five consecutive days. Origin of pentad First recorded in 1645–55; from Greek pentad- (stem of pentás ) group of five; see origin at pent-, -ad¹ Words nearby pentad pent, penta-, pentachloronitrobenzene, pentachlorophenol, pentacle, pentad, pentadactyl, pentadecagon, pentaerythritol, pentaerythritol tetranitrate, pentagon Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for pentad Nitrogen in the triad condition in the amines is far less poisonous than in the pentad condition. Poisons: Their Effects and Detection\|Alexander Wynter Blyth Five, or the pentad, is everything; it stops the power of poisons, and is dreaded by evil spirits. Three Thousand Years of Mental Healing\|George Barton Cutten There is something to be said for this view, but on the whole the balance of the evidence is in favor of nitrogen being a pentad. Scientific American Supplement, No. 324, March 18, 1882\|Various But this oddness belongs to other numbers also (pentad, heptad, &c.). Aristotle\|George Grote In 1820, he added to the last a pentad, so that the whole list amounted to sixty-five. Man and His Migrations\|R. G. (Robert Gordon) Latham British Dictionary definitions for pentad pentad / (ˈpɛntæd) / noun a group or series of five the number or sum of five a period of five years chem a pentavalent element, atom, or radical meteorol a period of five days Word Origin for pentad C17: from Greek pentas group of five Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Words related to pentad cinquefoil, pentangle, pentagram, quintuple, lustrum, cinque, quinquennium, pentacle, quintette, quintuplet, pentagon, limerick, quincunx, quinquennial, quintuplicate
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pentad

noun

Origin of pentad

Words nearby pentad

Example sentences from the Web for pentad

British Dictionary definitions for pentad

noun

Word Origin for pentad

Words related to pentad