Seta is a term used in biology to describe a bristle or stiff hair on an organism. So, setigerous means "having or bearing setae." Some synonyms for the word setigerous include setaceous, setose, setal, setiform, and setigerent. These words are used to describe various organisms that have setae, from insects and arthropods to worms and marine animals such as bristle worms. By using synonyms for setigerous, scientists can accurately describe the physical characteristics of different organisms and better understand their taxonomy and evolutionary history.