Dictionary.com Thesaurus.com

pinnation

American

[pi-ney-shuhn] / pɪˈneɪ ʃən /

noun

Botany.

pinnate condition or formation.

Etymology

Origin of pinnation

First recorded in 1870–75; pinnate + -ion

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.