cotyledon
Concise Oxford English Dictionary © 2008 Oxford University Press:
cotyledon /ˌkɒtɪˈliːd(ə)n/
▶noun
- 1 Botany an embryonic leaf in seed-bearing plants, one or more of which are the first leaves to appear from a germinating seed.
- 2 a succulent plant of the stonecrop family. [Genus Cotyledon.]
– derivatives
cotyledonary adjective.
cotyledonary adjective.
– origin C16: from L., ‘navelwort’, from Gk kotulēdōn ‘cup-shaped cavity’.
'cotyledon' also found in these Oxford entries:

