# F50

> English word · Noun

## Definitions
1. A hydrofoil catamaran sailing racing yacht, with a wingsail mainsail.

## Etymology
From foil + fifty, from AC50; because it measures approximately 50 feet on the waterline, and uses hydrofoils, and is derived from the AC50 class.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/f50