An astrointerferometer refers to an astronomical instrument designed to observe celestial objects using the principle of interferometry. Some synonyms for the word astrointerferometer include astronomical interferometer, radio interferometer, interferometric radio telescope, interferometric array, millimeter-wave interferometer, and aperture synthesis telescope. These instruments collect data from multiple telescopes, combining it to create high-resolution images of celestial objects, including stars, galaxies, and black holes. Astrointerferometers play a vital role in astronomical research, providing insights into the nature and behavior of astronomical phenomena and contributing to our understanding of the universe.