Learn how to say Cancerian correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word Cancer:
1 Astronomy a constellation (the Crab), said to represent a crab crushed under the foot of Hercules. It contains the globular star cluster of Praesepe or the Beehive.
(as genitive Cancri /ˈkaŋkri/) used with preceding letter or numeral to designate a star in this constellation:
the star Delta Cancri
2 Astrology the fourth sign of the zodiac, which the sun enters at the northern summer solstice (about 21 June).
(a Cancer) a person born when the sun is in the sign of Cancer.