| arbor dianae | <chemistry> A precipitation of silver, in a beautiful arborescent form. Origin: L, the tree of Diana, or silver. Source: Websters Dictionary (01 Mar 1998) |
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| arbor | A kind of latticework formed of, or covered with, vines, branches of trees, or other plants, for shade; a bower. Origin: OE. Herber, herbere, properly a garden of herbs, F. Herbier, fr. L. Herbarium. See Herb, and cf. Herbarium. 1. <botany> A tree, as distinguished from a shrub. 2. [Cf. F. Arbre. <mechanics> An axle or spindle of a wheel or opinion. A mandrel in lathe turning. Arbor Day, a day appointed for planting trees and shrubs. Origin: L, a tree, a beam. Source: Websters Dictionary (01 Mar 1998) |
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| arbor vitae | 1. <botany> An evergreen tree of the cypress tribe, genus Thuja. The American species is the T. Occidentalis. 2. <anatomy> The treelike disposition of the gray and white nerve tissues in the cerebellum, as seen in a vertical section. Origin: L, tree of life. Source: Websters Dictionary (01 Mar 1998) |
| arbor vitae uteri | The two longitudinal ridges, anterior and posterior, in the mucous membrane lining the cervix uteri, from which numerous secondary folds, or rugae, branch off. Synonym: plicae palmatae, arbor vitae uteri, lyra uterina. (05 Mar 2000) |