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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
随便看
fall flat
fall flat on your face
fall for
fall foul of
fall from grace/favor
fall from grace/favour
fall guy
fallible
fall in
falling-out
falling star
fall in love
fall into
fall into place
fall in with
fall off
fall-off
fall on
fall on deaf ears
fall on stony ground
fallopian tube
fall out
fallout
fallout shelter
fall over
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：2025/12/4 18:55:27