ˌperəˌdinēˈāsēˌē noun plural
Usage: capitalized
Etymology: New Latin, from Peridinium, type genus + -aceae
: a family of unicellular algae (order Peridiniales) that was formerly nearly coextensive with the zoological family Peridiniidae but is now often restricted to Peridinium and a few closely related marine forms
• peri·din·i·a·ceous | ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷|āshəs adjective