mutualismn. 互助論、互利共生共生、共棲學術名詞互利共生：生命科學、生態學、地理學、海洋科學、動物學、醫學互惠共生現象：海洋地質學真正共生：植物學互依共存：植物學互利共生現象：土壤學英文釋義the relation between two different species of organisms that are interdependent; each gains benefits from the other