periscope
Periscope (noun) means a tube-shaped viewing device with mirrors or prisms that lets someone see over or around an obstacle. Example: “The submarine crew raised the periscope to scan the surface.”
How to use periscope
Learner’s notesIn plain EnglishA device (classically on a submarine) that lets you see around a corner or above the surface without exposing yourself.
Word forms
- Plural
- periscopes
- Third person singular
- periscopes
- Past tense
- periscoped
Fill the gap
Can you complete this real example?
The submarine crew raised the _____ to scan the surface.
Etymology
Built in English from peri- ("around") + -scope ("instrument for viewing").