Pronunciation: (per"u-skop'ik), [key]
1. Optics.(of certain lenses in special microscopes, cameras, etc.) giving distinct vision obliquely, or all around, as well as, or instead of, in a direct line.
2. pertaining to periscopes or their use. Also,per"i•scop'i•cal.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.