Of, relating to, containing, or conveying semen or seed.
Of, relating to, or having the power to originate; creative.
Highly influential in an original way; constituting or providing a basis for further development: a seminal idea in the creation of a new theory.
seminal sem·i·nal (sěm'ə-nəl) adj. Of, relating to, containing, or conveying semen or seed.