protoplanetary

Etymology 1
and

Adjective

 * 1)  Of or pertaining to a protoplanet.

Translations

 * Finnish: esiplanetaarinen
 * German: protoplanetar, protoplanetarisch
 * Russian:
 * Spanish:

Etymology 2
From, from +.

Adjective

 * 1) Relating to a stage in the life of a  star or its  during the star's final stages of life