protostar

/proh-toh-stahr/US // ˈproʊ toʊˌstɑr //UK // (ˈprəʊtəʊˌstɑː) //

原星,原子星,原星号,原生星

Definitions

n.名词 noun

1
Astronomy.
- : an early stage in the evolution of a star, after the beginning of the collapse of the gas cloud from which it is formed, but before sufficient contraction has occurred to permit initiation of nuclear reactions at its core.