trimaran

This term describes a specific architectural design of multihull vessels. It is distinct from a catamaran, which has only two hulls. The primary purpose of the trimaran configuration is to provide extreme stability and reduce heel without requiring a heavy keel, making it a preferred choice for high-speed racing and long-distance oceanic crossings.

In technical and nautical contexts, the word is used neutrally to describe the vessel's physical structure. It is rarely used metaphorically and remains confined to maritime engineering and sailing terminology.