Telescoping

tel·e·scope  (tl-skp)

n.

1. An arrangement of lenses or mirrors or both that gathers visible light, permitting direct observation or photographic recording of distant objects.

2. Any of various devices, such as a radio telescope, used to detect and observe distant objects by their emission, transmission, reflection, or other interaction with invisible radiation.

v. tel·e·scoped, tel·e·scop·ing, tel·e·scopes

v.tr.

1. To cause to slide inward or outward in overlapping sections, as the cylindrical sections of a small hand telescope do.

2. To make more compact or concise; condense.

v.intr.

To slide inward or outward in or as if in overlapping cylindrical sections: a camp bucket that telescopes into a disk.

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[New Latin telescopium or Italian telescopio, both from Greek tleskopos, far-seeing : tle-, tele- + skopos, watcher; see spek- in Indo-European roots.]