Meaning & use
periscope
An optical instrument with mirrors or prisms that lets a viewer see over or around an obstacle.
See it in a sentence
The submarine crew used the periscope to scan the surface for passing ships.
The children built a cardboard periscope so they could see over the tall fence.
A note on using this word
Periscope combines 'peri-' (around) with '-scope' (viewing instrument), the same pattern seen in telescope.
Words with a similar meaning
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