英语词汇protocloud怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	protocloud
释义	Definition of protocloud in English: protocloud noun Astronomy 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. Definition of protocloud in US English: protocloud noun Astronomy 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.
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Definition of protocloud in English: