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One of two horizontal crosspieces near the upper end of a section of mast on a sailing vessel, serving to spread the shrouds for the section above.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Nautical Terms) nautical either of a pair of wooden or metal braces on the head of a mast to support the topmast, etc
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
either of a pair of horizontal timbers or metal bars spreading the shrouds on a mast.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
crosstree[ˈkrɒsˌtriː] n (Naut) → crocetta
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995