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seminal

sem·i·nal

seminal

 
 
pronunciation:
se m nl
part of speech: adjective
definition 1: of seed or of semen.
definition 2: containing the potential for creative development; original.
a seminal theory in physics
definition 3: of critical importance; essential.
Your research paper will not be taken seriously unless you spend more time discussing Darwin's seminal work on the evolution of species.
derivation: seminally (adv.)