dicotyledon
Concise Oxford English Dictionary © 2008 Oxford University Press:
dicotyledon /ˌdʌɪkɒtɪˈliːd(ə)n/
▶noun Botany a plant with an embryo bearing two cotyledons, such plants constituting the larger (Dicotyledoneae) of the two classes of flowering species. Compare with monocotyledon.
– derivatives
dicotyledonous adjective.
dicotyledonous adjective.
'dicotyledon' also found in these Oxford entries:

