Parabolic reflector and Radio telescope

Parabolic reflector noun - A concave reflector used to produce a parallel beam when the source is placed at its focus or to focus an incoming parallel beam.

Radio telescope and parabolic reflector are semantically related In some cases you can replace phrase "Radio telescope" with "Parabolic reflector", this phrases are similar.

Radio telescope noun - Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources.

Parabolic reflector and radio telescope are semantically related in astronomical telescope topic. You can use "Parabolic reflector" instead a noun phrase "Radio telescope".