seminal
US /ˈsem.ə.nəl/
UK /ˈsem.ə.nəl/

1.
strongly influencing later developments
:
•
His seminal work on quantum physics changed the field forever.
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The book is considered a seminal text in feminist theory.
2.
of, relating to, or containing semen
:
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The study focused on the composition of seminal fluid.
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Certain glands contribute to the production of seminal plasma.