of or relating to a decade.
Origin of decadal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for decadal
Contemporary Examples of decadal
“This is change occurring in a decadal times scale,” Hansen said.NASA’s New York–Based Space Institute the Hub of Climate-Change Research
August 8, 2012