D defs.my
Entry 1 sense Webster, 1913

Crosstrees

/(-tr?z`)/ · Cross·trees · IPA
01 n. pl. 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 semic…
  1. 1.
    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.”(Naut.)