actinia
noun
ac·tin·ia
ak-ˈti-nē-ə
1
capitalized in some classifications : a genus of sea anemones nearly coextensive with the order Actiniaria
2
plural actiniae
ak-ˈti-nē-ˌē
or actinias : any sea anemone or related animal 
Word History
Etymology
borrowed from New Latin, from Greek aktīn-, aktís "ray, beam" + New Latin -ia -ia entry 1
First Known Use
1752, in the meaning defined at sense 1
- peppercorn
- peppercorn rent
- peppercorns
- peppered
- peppered moth
- peppered with
- pepperer
- pepperers
- peppergrass
- peppergrass beetle
- peppergrasses
- pepperidge
- pepperidges
- pepperier
- pepperiest
- pepperily
- pepperiness
- pepperinesses
- peppering
- peppering with
- pepperings
- pepperish
- pepperishly
- peppermills
- peppermint