ˌkärsəˈnēs(h)ēəm noun
( plural carcinoe·cia -s(h)ēə)
Etymology: New Latin, from carcin- + -oecium (from Greek oikion house, nest, diminutive of oikos house) — more at vicinity
: a colony of zoanthidean anemones (genus Epizoanthus ) enclosing a hermit crab after dissolving the shell in which the crab lodged