Definition of metaorganism in English:
metaorganism
noun ˈmɛtəˌɔːɡ(ə)nɪz(ə)mˈmɛtəˌɔːɡənɪz(ə)m
An entity, especially a social group, formed by the aggregation of a number of individual organisms.
Origin
Mid 19th century (in an earlier sense). From meta- + organism.