dead·light
| \ ˈded-ˌlīt
\
\
Definition of deadlight
: a metal cover or shutter fitted to a port to keep out light and water
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“Deadlight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deadlight. Accessed 8 Mar. 2021.
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Time Traveler for deadlight
The first known use of deadlight was in 1726
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