¹ Source: wiktionary.com
Definition of Protoplanetary
1. [adj]
Lexicographical Neighbors of Protoplanetary
Literary usage of Protoplanetary
Below you will find example usage of this term as found in modern and/or classical literature:
1. Exploring Organic Environments in the Solar System by National Research Council (U.S.) (2007)
"protoplanetary DISKS The early evolution of a young stellar object proceeds with
rapid and dramatic changes.18 Stars begin their lives in molecular clouds. ..."
2. Plasma Physics Of The Local Cosmos by National Research Council, National Academy of Sciences, Committee on Solar and Space Physics (2004)
"... to dust-plasma interactions in cometary atmospheres, interstellar molecular
clouds, protoplanetary disks, planetary rings, and stellar nebulas. ..."