▪ I. arbor1 Mech.
(ˈɑːbə(r))
Also 7 arber, 8 arbre.
[a. F. arbre tree, also axis or principal piece of a wheel or machine; subseq. assimilated to L. arbor.]
a. The main support or beam of a machine (e.g. of a crane or windmill); b. The axle or spindle on which a wheel revolves, esp. in clocks and watches. (Cf. axle-tree.) arbor-chuck: (see quot.)
| 1659 J. Leak Water-works 28 To the Arber of the said Pinion there shall be a Wheel having 32 Teeth. 1727–51 Chambers Cycl. s.v. Crane, The modern crane consists of several members..the principal whereof is a strong perpendicular beam, or arbor. 1759 Pullein in Phil. Trans. LI. 27 Two wheels..fixed upon one common arbre. 1847 Craig Arbor-chuck..a chuck, consisting merely of a spindle, generally made of metal, projecting from the mandril of the lathe, used in turning and polishing rings, hollow cylinders, etc. 1857 Denison Clocks & Locks 4 The prolonged arbor of the centre wheel. |
▪ II. ‖ arbor2
(ˈɑːbɔː(r))
The Latin word for ‘tree,’ used as part of various names in Bot., Chem., etc.; as in Bot. arbor Judæ, the Judas tree (Cercis siliquastrum); in Chem. arbor Dianæ, the arborescent or tree-like appearance formed upon the introduction of mercury into a solution of nitrate of silver; arbor Saturni, the similar precipitate formed when a piece of zinc is put into a solution of acetate of lead; arbor vitæ, q.v.
| 1669 Worlidge Syst. Agric. (1681) 100 As Arbor-Judæ, Laburnum, etc. 1741 Compl. Fam.-Piece ii. iii. 362 Transplant the Arbor Judæ. |
▪ III. arbor
variant spelling of arbour.