actinobranch
noun
ac·tin·o·branch
ak-ˈti-nə-ˌbraŋk
variants or actinobranchia
¦ak-tə-(ˌ)nō-ˈbraŋ-kē-ə
plural -s
: a gill-like organ of certain Anthozoa
Word History
Etymology
New Latin actinobranchia, from actin- + branchia
First Known Use
circa 1901, in the meaning defined above