8 letters · 11 points in Scrabble
noun tiny marine and freshwater crustaceans with a shrimp-like body enclosed in a bivalve shell
originFrom Ancient Greek ὀστρακώδης (ostrakṓdēs, “covered with shell”), from ὄστρακον (óstrakon, “clay pot; shell”); compare translingual Ostracoda.
Etymology from Wiktionary, CC BY-SA 3.0