rhi·nen·ceph·a·lon (rī′nĕn-sĕfə-lŏn′, -lən)
n. pl. rhi·nen·ceph·a·la (-lə)
The olfactory region of the brain, located in the cerebrum.
rhi′nen·ce·phalic (-sə-fălĭk) adj.
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.