periscopenoun [ C ]
uk/ˈper.ɪ.skəʊp/us/ˈper.ɪ.skoʊp/a long, vertical tube containing a set of mirrors that gives you a view of what is above you when you look through the bottom of the tube:
Periscopes are used in submarines to allow you to look above the surface of the water.
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Parts of ships & boats
- abaft
- boathook
- boiler room
- capstan
- diving bell
- echo sounder
- engine room
- gangplank
- gunnel
- helm
- hull
- jib
- lanyard
- lifebelt
- mast
- oar
- porthole
- rib
- sail
- tiller
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