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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
out loud
outlying
outmaneuver
outmanoeuvre
outmatch
outmoded
outnumber
out of action
out of (all) proportion (to something)
out-of-body experience
out of bounds
out of breath
out of commission
out of condition
out of control
out-of-court
out-of-date
out of doors
out-of-doors
out of favor
out of favour
out of force of habit
out of hand
out of harm’s way
out of hearing
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：2026/3/27 10:18:13