Noun
gravitational lens (plural gravitational lenses)
(astronomy) A distribution of matter whose gravitational field bends the path of light rays sufficiently to distort, magnify or multiply images of more distant objects.
Eshleman, Von R., "Gravitational lens of the Sun: its potential for observations and communications over interstellar distances," Science, Vol. 205, No. 4411 (1979) pp. 1133-1135. Source: Internet
"Gravitational lens of the sun: its potential for observations and communications over interstellar distances," Science, 205 (4411): 1133-1135. Source: Internet