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royal mast
(nautical) The fourth and highest part of the mast from the deck, commonly made in one piece with the topgallant mast.
meritorious mast
(naval) A modern version of the mast (naval disciplinary hearing) in which the commanding officer singles out a crewmember for formal praise.
mast years
mast year
A year in which a certain species or population of plants produces a very large quantity of seeds or fruit.
mast bumping
(aviation) A dangerous condition where the mast of a helicopter contacts adjacent fixed structure while rotating, damaging the mast and potentially resulting in the separation of the main rotor from the helicopter.
jigger-mast
Alternative spelling of jiggermast
main-mast
Alternative spelling of mainmast
jigger mast
Alternative spelling of jiggermast
fore-mast
Alternative spelling of foremast