名詞 nebula:

1. a medicinal liquid preparation intended for use in an atomizer
2. cloudiness of the urine
3. an immense cloud of gas (mainly hydrogen) and dust in interstellar space
4. (pathology) a faint cloudy spot on the cornea

1. You can see nebulae in the clear summer sky.
   在晴朗的夏夜可以看到天上的星云。

neb.u.la

n.（名詞）
【復數(shù)】 neb.u.lae[-lô.] 或 neb.u.las
Astronomy
【天文學】
A diffuse mass of interstellar dust or gas or both, visible as luminous patches or areas of darkness depending on the way the mass absorbs or reflects incident radiation.
星云：星際空間的塵埃或氣體或兩者共同構(gòu)成的巨大天體，由其對光線的吸收和反射來決定其明亮可見或黑暗一團
See galaxy
參見 galaxy
Pathology
【病理學】
A cloudy spot on the cornea.
角膜翳：角膜上微薄遮光點
Cloudiness in the urine.
溷濁：尿的顏色陰暗
A liquid medication applied by spraying.
噴霧劑：噴霧的液體制劑

來源：
Middle English nebule [cloud, mist]
中古英語 nebule [云，塵]
from Latin nebula * see nebh-
源自 拉丁語 nebula *參見 nebh-

【引伸】
neb.ular
adj.（形容詞）