cotyledon
noun
[ ˌkɒtɪˈliːd(ə)n ]
• an embryonic leaf in seed-bearing plants, one or more of which are the first leaves to appear from a germinating seed.
• a succulent plant of the stonecrop family, some kinds of which are grown as ornamentals.
Origin:
mid 16th century (denoting a patch of villi on the placenta of mammals): from Latin, ‘navelwort’ (which has cup-shaped leaves), from Greek kotulēdōn ‘cup-shaped cavity’, from kotulē ‘cup’.
