telescopic
adj. B2 Upper Intermediate US //ˌtɛɫəˈskɔpɪk// UK //tˌɛlɪskˈɒpɪk// tele·scop·ic
adj. describing something that can be made longer or shorter by sliding parts inside each other, like a telescope. It can also describe something that looks far away or is very small.
adj. relating to or resembling a telescope; specifically, capable of being extended or retracted by telescoping parts. Often used to describe visual perception or the physical structure of an instrument.
The chair has a telescopic leg for easy storage.
The engineer designed a telescopic boom that could reach the top of the building without needing a crane.
Through a telescopic lens, the astronomer observed the faint glow of a distant galaxy that would otherwise be invisible to the naked eye.
From tele- + -scopic, after telescope.