Learn how to say Tridents correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word trident:
1a three-pronged spear, especially as an attribute of Poseidon (Neptune) or Britannia.
2 (Trident) a US design of submarine-launched long-range ballistic missile.
late Middle English: from Latin trident-, from tri- ‘three’ + dens, dent- ‘tooth’