What is "trimarans"

Usage examples of "trimarans".

But on the drawing boards was a series of freighter-sized floating kampongs, massive sail-powered trimarans for the deep ocean, with glassed-in greenhouse decks.

All the bluecollars he had grown and lived with, who sweated, worked, and died, so that people named Bargeta could have trimarans on Mars.

She had navigated racing trimarans across the Pacific, and it did not seem likely that a few kilometres of dead-calm water could present much of a challenge to her skills.