| Arbor Vitae 1. (n.) An evergreen tree of the cypress tribe, genus Thuja. The American species is the T. occidentalis. 2. (n.) The treelike disposition of the gray and white nerve tissues in the cerebellum, as seen in a vertical section. Thesaurus Entries arachnoid, arbor vitae, archipallium, between brain, brain stem, cerebellar hemispheres, cerebral cortex, cerebrospinal fluid, cerebrum, convolution, corpus callosum, corpus striatum, diencephalon, dura mater, endbrain, fissure, folia, forebrain, fornix, frontal lobe, glial cells, globus pallidus, gray matter, gyrus, hindbrain, hippocampus, hypothalamus, lenticular nucleus, limbic lobe, little brain, lobe, mantle, medulla oblongata, meninges, mesencephalon, metencephalon, midbrain, myelencephalon, neopallium, occipital lobe, optic chiasm, pallium, parietal lobe, pia mater, pineal body, pituitary body, pons, reticular system, rhombencephalon, subthalamus, telencephalon, temporal lobe, thalamus, ventricle, vermis, white matter |