• synonyms


noun, plural ar·bo·res [ahr-buh-reez] /ˈɑr bəˌriz/. Botany.
  1. a tree.
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Origin of arbor3

1660–70; < New Latin, Latin: tree.
Related formsar·bo·resque, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for arboresque


  1. the US spelling of arbour
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  1. a rotating shaft in a machine or power tool on which a milling cutter or grinding wheel is fitted
  2. a rotating shaft or mandrel on which a workpiece is fitted for machining
  3. metallurgy a part, piece, or structure used to reinforce the core of a mould
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Word Origin

C17: from Latin: tree, mast
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for arboresque



c.1300, herber, "herb garden," from Old French erbier "field, meadow; kitchen garden," from Latin herba "grass, herb" (see herb). Later "a grassy plot" (early 14c., a sense also in Old French), "a shaded nook" (mid-14c.). Probably not from Latin arbor "tree," though perhaps influenced by its spelling.

The change from er- to ar- before consonants in Middle English also reflects a pronunciation shift: cf. farm from ferme, harbor from Old English herebeorg.

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Online Etymology Dictionary, © 2010 Douglas Harper

arboresque in Medicine


n. pl. ar•bo•res (ärbə-rēz′)
  1. A treelike anatomical structure.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.