Definition of protostar in English:


Line breaks: proto|star
Pronunciation: /ˈprəʊtəʊstɑː


  • A contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun.
    More example sentences
    • Elongated chains of dust grains like these appear in the early stages of planet formation around a young protostar, according to a microgravity experiment inside a rocket.
    • By peering in wavelengths not visible to the naked eye, through the nebula's gas and dust, astronomers can identify very young stars and even protostars - those that are about to light up, once the gases reach a critical density.
    • Rotation forces some of the matter to accumulate in a disk rotating around the protostar (s).

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Pronunciation: ˌkələrəˈto͝orə
elaborate ornamentation of a vocal melody