heptad

play
noun hep·tad \ˈhep-ˌtad\

Definition of heptad

  1. :  a group of seven

Origin and Etymology of heptad

Greek heptad-, heptas, from hepta


First Known Use: 1660


Seen and Heard

What made you want to look up heptad? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

very important or noticeable

Get Word of the Day daily email!