[ trih-dak-nuh ]
/ trɪˈdæk nə /


a genus of giant clams inhabiting reefs in the South Pacific, attaining a diameter of 4 feet (1.2 meters) or more, and weighing over 500 pounds (227 kg).

Origin of Tridacna

1770–80; < New Latin, noun use of feminine of Latin tridacnus requiring three bites < Greek trídaknos, equivalent to tri- tri- + dákn(ein) to bite + -os adj. suffix Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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