Webster's Revised Unabridged Dictionary · 1913

Arbor

Arbor ({not transcribed}) , noun

[Old English herber, herbere, properly a garden of herbs, French herbier, from Latin herbarium. See Herb, and compare Herbarium.]

A kind of latticework formed of, or covered with, vines, branches of trees, or other plants, for shade; a bower. — Sir P. Sidney

Arbor , noun

[Latin, a tree, a beam.]

1.
(Botany) A tree, as distinguished from a shrub.
2.
(a) (Mechanics) An axle or spindle of a wheel or opinion.
(b)
(Mechanics) A mandrel in lathe turning. — Knight