Hypotrachelium
Webster's Revised Unabridged Dictionary
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Hypotrachelium
(Arch) Same as Gorgerin.
Century Dictionary and Cyclopedia
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(n)
hypotrachelium
In architecture, in the Doric order, the junction of the capital and the shaft, marked by a bevel or cut around the lower edge of the capital block. The channeling is carried across the hypotrachelium, upon the capital, as far as the annulets. The hypotrachelium has the appearance of a sharp black line encircling the shaft near its summit. Its material function was to preserve the sharp arrises of the capital from chipping when the block was put in place; its artistic function is to serve as the first step in the transition from the vertical lines of the shaft to the horizontal lines of the entablature. Vitruvius applies the term hypotrachelium to the entire neck of the capital, or that part which, while in one block with the echinus, forms a continuation of the shaft. Also incision, hypotrachelion.
Etymology
Webster's Revised Unabridged Dictionary L., fr. Gr. ; under + neck