adjective

• Pertaining to, or carried out by means of, a telescope.
• (chiefly astronomy) Seen by means of a telescope; only visible through a telescope.
• Capable of seeing distant objects; far-seeing.
• Able to be extended or retracted by the use of parts that slide over one another.
• Referring to parts being extended or retracted along coinciding axes (with or without direct contact between the parts).