pentad

[ pen-tad ]
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noun
  1. a period of five years.

  2. a group of five.

  1. the number five.

  2. Chemistry. a pentavalent element or group.

  3. Climatology. a period of five consecutive days.

Origin of pentad

1
First recorded in 1645–55; from Greek pentad- (stem of pentás ) group of five; see origin at pent-, -ad1

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British Dictionary definitions for pentad

pentad

/ (ˈpɛntæd) /


noun
  1. a group or series of five

  2. the number or sum of five

  1. a period of five years

  2. chem a pentavalent element, atom, or radical

  3. meteorol a period of five days

Origin of pentad

1
C17: from Greek pentas group of five

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