The black hole thought to form following the gravitational collapse of a massive star(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "collapsar" in a sentence
"The collapsar was a black pinprick against the filtered image of the huge star, and then a dot, and then a rapidly swelling ball, and then there was the odd twisting feeling and we were suddenly in dark deep space."
"Â She has entered the anomaly and found herself transformed, and Mon-El (along with Gates and Brainiac 5) were prepared to enter the collapsar and save her."
"Previously, on Justice Society of America: When Starman was forced to create a collapsar during a mission, the JSA found themselves with a new/old member: the Earth-22 version of Superman."