cotyledon
the primary or rudimentary leaf of the embryo of seed plants.
Anatomy. any of several lobules of the placenta.
Origin of cotyledon
1Other words from cotyledon
- cot·y·le·don·al, cot·y·le·don·ar·y [kot-l-eed-n-er-ee], /ˌkɒt lˈid nˌɛr i/, cot·y·le·don·ous, adjective
- non·cot·y·le·don·al, adjective
- non·cot·y·le·don·ar·y, adjective
- non·cot·y·le·don·ous, adjective
- pseu·do·cot·y·le·don·al, adjective
- pseu·do·cot·y·le·don·ar·y, adjective
Words Nearby cotyledon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use cotyledon in a sentence
The term monocotyledon is applied to these plants because the embryo has only one cotyledon or seed-leaf.
The Sea Shore | William S. FurneauxA bristle was gummed to one cotyledon, and beyond it a triangular bit of card was fixed, and in front a vertical glass.
More Letters of Charles Darwin Volume II | Charles DarwinWithin the cotyledon will be found a little growing shoot pointed toward the top of the kernel.
The First Book of Farming | Charles L. GoodrichIn Wheat and Oats the cotyledon can be easily seen in the largest seedlings by pulling off the dry husk of the grain.
Outlines of Lessons in Botany, Part I; From Seed to Leaf | Jane H. NewellClosely applied to one side of this, so closely that it is difficult to separate it perfectly, is the single cotyledon.
Outlines of Lessons in Botany, Part I; From Seed to Leaf | Jane H. Newell
British Dictionary definitions for cotyledon
/ (ˌkɒtɪˈliːdən) /
a simple embryonic leaf in seed-bearing plants, which, in some species, forms the first green leaf after germination
a tuft of villi on the mammalian placenta
Origin of cotyledon
1Derived forms of cotyledon
- cotyledonous or cotyledonoid, adjective
- cotyledonal, adjective
- cotyledonary, 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
Scientific definitions for cotyledon
[ kŏt′l-ēd′n ]
A leaf of the embryo of a seed-bearing plant. Most cotyledons emerge, enlarge, and become green after the seed has germinated. Cotyledons either store food for the growing embryo (as in monocotyledons) or absorb food that has been stored in the endosperm (as in other angiosperms) for eventual distribution to the growing parts of the embryo. Also called seed leaf See more at eudicotyledon monocotyledon.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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