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单词
penumbra
释义
penumbra
noun
countable
UK
/
pəˈnʌmbrə
/
Word Forms
singular
penumbra
plural
penumbras
DEFINITIONS
1
1
an area covered by the outer part of a shadow, so that it is not completely dark
Synonyms and related words
The outer parts of objects or spaces
apex
back
back end
penumbra
noun
countable
physics
US
/
pəˈnʌmbrə
/
Word Forms
singular
penumbra
plural
penumbras
DEFINITIONS
1
1
an area covered by the outer part of a shadow, so that it is not completely dark
Synonyms and related words
The outer parts of objects or spaces
apex
back
back end
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英语词典包含67175条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。
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更新时间：2025/12/15 14:10:45