com·men·sal
adjective/kəˈmensl/
/kəˈmensl/
(biology)- living on another animal or plant and getting food from the situation, but doing no harm
共生的；共栖的 - commensal organisms
共栖体
Word Originlate 19th cent.: from medieval Latin commensalis, from com- ‘sharing’ + mensa ‘a table’. - commensal organisms