protoplanet

[ proh-toh-plan-it ]
/ ˈproʊ toʊˌplæn ɪt /

noun Astronomy.

the collection of matter, in the process of condensation, from which a planet is formed.

Origin of protoplanet

First recorded in 1945–50; proto- + planet

Words nearby protoplanet

protopathic, protopathic sensibility, protopectin, protophilic, protophloem, protoplanet, protoplanetary disk, protoplasm, protoplasmic astrocyte, protoplast, protopodite

British Dictionary definitions for protoplanet

protoplanet
/ (ˌprəʊtəʊˈplænɪt) /

noun

a planet in its early stages of evolution by the process of accretion