[ kot-l-eed-n ]
/ ˌkɒt lˈid n /
the primary or rudimentary leaf of the embryo of seed plants.
Anatomy. any of several lobules of the placenta.
Origin of cotyledon
1535–45; < Latin: navelwort < Greek kotylēdṓn a plant (probably navelwort), literally, a cuplike hollow, derivative of kotýlē cup
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, adjectivenon·cot·y·le·don·al, adjectivenon·cot·y·le·don·ar·y, adjectivenon·cot·y·le·don·ous, adjective
pseu·do·cot·y·le·don·al, adjectivepseu·do·cot·y·le·don·ar·y, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for cotyledonary
Modification of placenta from simple diffused to cotyledonary form.
The union between the cotyledonary leaves may continue after the young plant begins to germinate.
British Dictionary definitions for cotyledonary
/ (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
Derived Formscotyledonous or cotyledonoid, adjectivecotyledonal, adjectivecotyledonary, adjective
Word Origin for cotyledon
C16: from Latin: a plant, navelwort, from Greek kotulēdōn, from kotulē cup, hollow
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
Medicine definitions for cotyledonary
[ kŏt′l-ēd′n ]
One of the lobules constituting the uterine side of the placenta, consisting mainly of a rounded mass of villi.
A leaf of the embryo of a seed plant, which, upon germination, either remains in the seed or emerges, enlarges, and becomes green; a seed leaf.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for cotyledonary
[ 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.