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septimal

American  
[sep-tuh-muhl] / ˈsɛp tə məl /

adjective

  1. of or based on the number seven.

Etymology

Origin of septimal

1850–55; < Latin septim ( us ) seventh (derivative of septem seven ) + -al 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.