Meaning of hypotrachelium

hy•po•tra•che•li•um

Pronunciation: (hī"pō-tru-kē'lē-um), [key]
— pl. -li•a
  1. (on a classical column) any member, as a necking, between the capital and the shaft. Cf. trachelium.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.