metacentrePronunciation: /ˈmɛtəsɛntə/ (US metacenter)Definition of metacentre noun the point of intersection between an imaginary line drawn vertically through the centre of buoyancy of a floating vessel and a corresponding line through the new centre of buoyancy when the vessel is tilted. Derivatives metacentricPronunciation: /-ˈsɛntrɪk/ adjective Origin: late 18th century: from French métacentre (see meta-, centre)metacentre in other Oxford dictionaries Definition of metacentre in the US English dictionary