noun, genitive Cyg·ni [sig-nahy] /ˈsɪg naɪ/. Astronomy.
Origin of Cygnus
Examples from the Web for cygnus
The temperature of Cygnus X-1 from Hawking radiation is roughly a billionth of a degree above absolute zero.
"Sure, Cygnus," he muttered, and closed his eyes and dropped off to sleep.Master of None|Lloyd Neil Goble
In the year 1670 a new star appeared in the constellation Cygnus, attaining the third magnitude.Myths and Marvels of Astronomy|Richard A. Proctor
McGuire is taking us straight toward Cygnus at two gees and won't stop.A Spaceship Named McGuire|Gordon Randall Garrett
The cygnus niger of Juvenal is no rara avis in Australia; and time has here given ample proof of the ornithorynchus paradoxus.The Works of Charles and Mary Lamb|Charles Lamb
There are in Cygnus five principal stars, which form a constellation of rather remarkable form.The Story of the Heavens|Robert Stawell Ball