PROTOPLANET


Meaning of PROTOPLANET in English

noun Date: 1949 a hypothetical whirling gaseous mass within a giant cloud of gas and dust that rotates around a sun and is believed to give rise to a planet, ~ary adjective

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.