cotyledon

noun
cot·​y·​le·​don | \ ˌkä-tə-ˈlē-dᵊn How to pronounce cotyledon (audio) \

Definition of cotyledon

1 : a lobule of the mammalian placenta
2 : the first leaf or one of the first pair or whorl of leaves developed by the embryo of a seed plant or of some lower plants (such as ferns) — see seedling illustration

Other Words from cotyledon

cotyledonary \ ˌkä-​tə-​ˈlē-​də-​ˌner-​ē How to pronounce cotyledonary (audio) \ adjective

First Known Use of cotyledon

1540, in the meaning defined at sense 1

History and Etymology for cotyledon

New Latin, from Greek kotylēdōn cup-shaped hollow, from kotylē cup, anything hollow

Keep scrolling for more

Learn More about cotyledon

Share cotyledon

Dictionary Entries near cotyledon

-cotyl

cotyla

cotylar

cotyledon

cotyledonal

cotyliform

cotyligerous

Statistics for cotyledon

Look-up Popularity

Time Traveler for cotyledon

The first known use of cotyledon was in 1540

See more words from the same year

Keep scrolling for more

More Definitions for cotyledon

cotyledon

noun
cot·​y·​le·​don | \ ˌkät-ᵊl-ˈēd-ᵊn How to pronounce cotyledon (audio) \

Medical Definition of cotyledon

1 : a lobule of a mammalian placenta
2 : the first leaf or one of the first pair or whorl of leaves developed by the embryo of a seed plant or of some lower plants (as ferns)

Other Words from cotyledon

cotyledonary \ -​ˈēd-​ᵊn-​ˌer-​ē How to pronounce cotyledonary (audio) \ adjective

More from Merriam-Webster on cotyledon

Britannica.com: Encyclopedia article about cotyledon

Comments on cotyledon

What made you want to look up cotyledon? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

the range of authority or knowledge

Get Word of the Day daily email!

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt-painting-a-young-scholar-and-his-tutor
  • Which of the following is the earliest known sense of the word awe?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!