noun, genitive Cyg·ni [sig-nahy] /ˈsɪg naɪ/. Astronomy.
Origin of Cygnus
Examples from the Web for cygni
Bessel had anticipated him with the parallax of 61 Cygni by just two months.
There is as yet no certainty that the stars of 61 Cygni form a true binary combination.
The bright spot between β and γ Cygni is due to relatively bright stars.
Again, with reference to χ Cygni, he says, “The stars here also are remarkably uniform in size.”
The conclusions arrived at with regard to 61 Cygni may be applied with varying degrees of emphasis to other stars.The Story of the Heavens|Robert Stawell Ball