pro·to·gal·ax·y 
(prōtō-găl′ək-sē)
(prōtō-găl′ək-sē)n. pl. pro·to·gal·ax·ies
A cloud of gas, primarily hydrogen, that is forming a galaxy or has sufficient mass to eventually form a galaxy.
| 单词 | protogalaxy |
| 释义 | pro·to·gal·ax·y (prōtō-găl′ək-sē)n. pl. pro·to·gal·ax·ies A cloud of gas, primarily hydrogen, that is forming a galaxy or has sufficient mass to eventually form a galaxy. |
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