coalsack (English, noun)
expansion: coalsack (plural coalsacks)
Senses:
glosses: A sack for carrying coal.
topics: astronomy
natural-sciences
glosses: Any of the spaces in the Milky Way which are very black, owing to the nearly complete absence of stars.
Forms:
form: coalsacks
tags: plural
form: coal-sack
tags: alternative
form: coal sack
tags: alternative