Dicotyledonae vs dicot genus

Dicotyledonae and dicot genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dicotyledonae	Yes	No	No	No
dicot genus	Yes	No	No	No

Dicotyledonae (noun)	dicot genus (noun)
comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae (considered primitive), Caryophyllidae (an early and distinctive offshoot), and three more or less advanced groups: Dilleniidae, Rosidae, Asteridae	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination