Definition of primigenial in US English:

primigenial

adjective

  • 1That is generated or produced first; belonging to the earliest stage of existence; original, primitive, primary.

  • 2Zoology. Designating or relating to a species or variety regarded as an evolutionary ancestor of a related modern form.

Origin

Early 17th century; earliest use found in William Fulbecke (1560–?1603), lawyer and historian. From classical Latin prīmigenius first-born, original, primitive + -al.

Pronunciation

primigenial

/ˌprʌɪmɪˈdʒiːnɪəl/