transcription, транскрипция: [ ˈprō-tō-ˌpla-nət ]
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
• pro·to·plan·e·tary ˌprō-tō-ˈpla-nə-ˌter-ē adjective