(photography) A lens having a long focal length which produces a magnified view of distant objects.

A television program which consists of several episodes that are broadcast at regular intervals. / A group of episodes of such a program.

telegraphic

mobile phone, cell phone

(idiomatic) A situation in which a person unsuccessfully attempts to contact another person by telephone and leaves a message instead, and in which the second person then unsuccessfully attempts to return the initial call and leaves a message for the first person, and so on as if the two are playing a game of tag in which the most recent person to have been left with a message is now designated as "it" (i.e. as the player now obliged to chase the other and to attempt anew to make contact).

plural of telephone book

An achromatic telescope in which the coloured dispersion produced by a single object lens of crown glass is corrected by a smaller concave lens, or combination of lenses, of high dispersive power, placed at a distance in the narrower part of the converging cone of rays, usually near the middle of the tube.

A catadioptric telescope with a meniscus corrector.

A telegraph in which the signals are given by the deflections of a magnetic needle to the right or to the left of a certain position.

plural of telegraph plant