A single organism belonging to the group of freely moving animals, especially marine creatures that are not fixed to one location.
From Greek eleutheros 'free' and zoon 'animal,' with singular form ending -an. Describes individual mobile organisms.
A single fish or octopus would be an eleutherozoan—free to swim wherever it wants, unlike a barnacle stuck to a rock for life.
Complete word intelligence in one call. Free tier — 50 lookups/day.