What does "periscoping" mean?

present participle and gerund of periscope

What is a synonym for "periscoping"?

Common synonyms include: air cylinder, aqua lung, aqua-lung, aquascope, bathyscaphe, bathysphere.

verb

verb ·Rare ·Advanced level

Verb

1
present participle and gerund of periscope form-of, gerund, participle, present