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[dahy-kot-l-eed-n, dahy-kot-l-] /daɪˌkɒt lˈid n, ˌdaɪ kɒt l-/
noun, Botany.
any angiospermous plant of the class (or subclass) Dicotyledoneae, producing seeds with two cotyledons and having an exogenous manner of growth.
Compare monocotyledon.
Origin of dicotyledon
First recorded in 1720-30, dicotyledon is from the New Latin word Dicotyledones a pre-Linnean grouping of such plants. See di-1, cotyledon Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for dicotyledon


/daɪˌkɒtɪˈliːdən; ˌdaɪkɒt-/
any flowering plant of the class Dicotyledonae, normally having two embryonic seed leaves and leaves with netlike veins. The group includes many herbaceous plants and most families of trees and shrubs
primitive dicotyledon. any living relative of early angiosperms that branched off before the evolution of monocotyledons and eudicotyledons. The group comprises about 5 per cent of the world's plants
Compare monocotyledon
Often shortened to dicot
Derived Forms
dicotyledonous, adjective
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
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dicotyledon in Science
dicotyledon (dī'kŏt'l-ēd'n) or dicot
An angiosperm that is not a monocotyledon, having two cotyledons in the seed. The term dicotyledon serves as a convenient label for the eudicotyledons, the magnoliids, and a varied group of other angiosperms, but it does not correspond to a single taxonomic group. Compare monocotyledon. See more at eudicotyledon, leaf, magnoliid.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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