• synonyms


[mon-uh-kot-l-eed-n-uh s]
  1. belonging or pertaining to the monocotyledons.
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Origin of monocotyledonous

First recorded in 1760–70; monocotyledon + -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of monocotyledonous

monocotyledonous in Science


  1. Any of a class of angiosperm plants having a single cotyledon in the seed. Monocotyledons have leaves with parallel veins, flower parts in multiples of three, and fibrous root systems. Their primary vascular bundles are scattered throughout the stem, not arranged in a ring as in eudicotyledons. Grasses, palms, lilies, irises, and orchids are monocotyledons. See more at leaf. Compare eudicotyledon.
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Related formsmonocotyledonous adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.