| 单词 | nebula |
| 释义 | Word Frequency nebula(ˈnɛbjʊlə) nounWord forms: plural -lae (-ˌliː) or -las 1. astronomy a diffuse cloud of particles and gases (mainly hydrogen) that is visible either as a hazy patch of light (either an emission or a reflection nebula) or an irregular dark region against a brighter background (dark nebula) Compare planetary nebula 2. pathology a. opacity of the cornea b. cloudiness of the urine 3. any substance for use in an atomizer spray Derived forms nebular (ˈnebular) adjective Word origin C17: from Latin: mist, cloud; related to Greek nephétē cloud, Old High German nebul cloud, Old Norse njól night |
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