sə̇ˈn(y)üzh(ē)ə, -zēə noun
( plural syn·usi·ae -z(h)ēˌē)
Etymology: New Latin, from Greek synousia social intercourse, society, company, from synous- (participle stem of syneinai to come together, assemble, gather, from syn- + einai to be) + -ia -y — more at is
: a structural unit of a major ecological community characterized by relative uniformity of life-form or of height and usually constituting a particular stratum of that community
the herbaceous synusia of open forest
• synusial adjective