Dictionary.com
Thesaurus.com

acotyledon

American  
[ey-kot-l-eed-n, ey-kot-] / ˈeɪˌkɒt lˈid n, eɪˌkɒt- /

noun

  1. a plant without cotyledons, therefore one belonging to a group lower than the seed plants.

acotyledon British  
/ əˌkɒtɪˈliːdən /

noun

  1. any plant, such as a fern or moss, that does not possess cotyledons

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • acotyledonous adjective

Etymology

Origin of acotyledon

First recorded in 1810–20; a- 6 + cotyledon

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.