arbor

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1. a leafy, shady recess formed by tree branches, shrubs, etc.
2. a latticework bower intertwined with climbing vines and flowers.
3. Obsolete. a grass plot; lawn; garden; orchard.

noun

1. Machinery.
   1. a bar, shaft, or axis that holds, turns, or supports a rotating cutting tool or grinding wheel, often having a tapered shank fitting tightly into the spindle of a machine tool.Compare mandrel.
   2. a beam, shaft, axle, or spindle.
2. Metallurgy. a reinforcing member of a core or mold.

noun, plural ar·bo·res [ahr-buh-reez] /ˈɑr bəˌriz/. Botany.

1. a tree.

noun

1. the US spelling of arbour

noun

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

n.

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.

n. pl. ar•bo•res (är′bə-rēz′)

1. A treelike anatomical structure.

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