cotyledon

See also: cotylédon

English

Structure of the placenta, with a placental cotyledon marked in rectangle.

Mimosa pudica seedling with two cotyledons and the first "true" leaf with six leaflets.

Etymology

From Latin cotylēdōn, from Ancient Greek κοτυληδών (kotulēdṓn, “cup-shaped cavity”), from κοτύλη (kotúlē, “cup”).

Pronunciation

• (UK) IPA^(key): /ˌkɒt.ɪˈliː.dən/

  • Audio (UK)

    (file)

• (General American) IPA^(key): /ˌkɑt.əˈliː.dən/

Noun

cotyledon (plural cotyledons)

1. (physiology) Each of the patches of villi on the foetal chorion in the placenta of ruminants and some other mammals.
   • 1997, Roy Porter, The Greatest Benefit to Mankind, Folio Society 2016, p. 72:

     Forced to apply animal findings to humans, his human womb also had cotyledons like a dog's.

2. (botany) The leaf of the embryo of a seed-bearing plant; after germination it becomes the first leaves of the seedling.

Synonyms

(botany): seed leaf

Derived terms

Derived terms

• monocotyledon
• dicotyledon
• hypocotyl
• epicotyl
• cotyledonal
• cotyledonary
• cotyledonous

Translations

patch of vili on the foetal chorion of some mammals

leaf of the embryo of a seed-bearing plant

• Dutch: zaadlob (nl) m or f
• Finnish: sirkkalehti (fi)
• French: cotylédon (fr) m
• Galician: cotiledón (gl) m
• German: Keimblatt (de) n
• Greek: κοτυληδόνα (el) f (kotylidóna)
• Hungarian: sziklevél (hu)
• Icelandic: kímblað (is) n
• Italian: cotiledone (it) m
• Japanese: 子葉 (ja) (しよう, shiyō)
• Karakalpak: bu'rtik
• Korean: 떡잎 (ko) (tteogip)
• Polish: liścień (pl) m
• Portuguese: cotilédone (pt) m
• Romanian: cotiledon (ro) n
• Serbo-Croatian: supka (sh) f
• Spanish: cotiledón (es) m
• Tagalog: bindahon
• Thai: ใบเลี้ยง (th) (bai-líiang)