Question: telescope

Answer: n. a device shaped like a long tube that you look through in order to see things that are far away

Question: microscope

Answer: n.a device used for producing a much larger view of very small objects so that they can be seen clearly

Question: periscope

Answer: n. an instrument containing lenses and mirrors by which an observer (as on a submerged submarine) can get a view that would otherwise be blocked

Question: horoscope

Answer: n. a diagram of the positions of planets and signs of the zodiac used by astrologers to foretell events of a person’s life

Question: arthroscope

Answer: n. a fiber-optic instrument surgically inserted through an incision near a joint (as the knee) and used to visually examine the joint interior