Crosstrees n. pl. (Naut.) Pieces of timber at a masthead, to which are attached the upper shrouds. At the head of lower masts in large vessels, they support a semicircular platform called the "top."
... when yer goes aloft," he said, in a sort of awesome tone meant to frighten me. "I've bin up theer on the main crosstrees when yer jist couldn't 'old yer 'air on yer 'ead, let alone 'oldin' on with one 'and fur yerself and t'other ... — Young Tom Bowling - The Boys of the British Navy • J.C. Hutcheson
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