primigenous

from The Collaborative International Dictionary of English v.0.48

Primigenious \Pri`mi*ge"ni*ous\, Primigenous \Pri*mig"e*nous\,
   a. [L. primigenus, primigenius. See {Primogeniture}.]
   First formed or generated; original; primigenial. --Bp. Hall.
   [1913 Webster]