Mizzenmast

['mɪzənmɑːst] or ['mɪzənmæst]

(noun.) third mast from the bow in a vessel having three or more masts; the after and shorter mast of a yawl, ketch, or dandy.

Typist: Rosanna--From WordNet

(n.) The hindmost mast of a three-masted vessel, or of a yawl-rigged vessel.

Typist: Stanley