protocloud
Astronomy
noun
A mass of gas and dust from which a galaxy is thought to develop; a protogalaxy.
Origin
1970s; earliest use found in Nature: a weekly journal of science.
| 单词 | protocloud |
| 释义 | protocloudAstronomy noun A mass of gas and dust from which a galaxy is thought to develop; a protogalaxy. Origin |
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