It refers to chromosomes that are not sex chromosomes (X and Y chromosomes). These chromosomes are numbered from 1 to 22 in humans.
Here's a breakdown:
* Autosome: A chromosome that is not a sex chromosome.
* Autosomal: Relating to or located on an autosome.
So, if you see the word "autosomal" in an English text, it's referring to something related to these non-sex chromosomes.