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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
of late
of like mind
of many/five/ten etc years’ standing
of many/five/ten etc. years’ standing
of necessity
of no account/of little account
of no consequence/of little consequence
of no fixed abode
of note
of old
of recent origin
of someone’s/something’s day
of sorts
ofsted
oft
oft-
often
oftentimes
of the day
of the essence
of the hour
of the moment
of tv etc fame
of tv etc. fame
of unsound mind
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：2026/4/17 20:31:37