A work raised in the middle of a wide ditch, to defend it.
A mound raised in the middle of a moat for defence when it is too wide.
sil'on, n. (fort.) a. work raised in the middle of a very wide ditch, an envelope. [Fr.]
Sulcus- s. Horizontal de la veine ombilicale, see Liver- s. Transversale, see Liver- s. de la Veine cave inferieur, see Liver- s. de la Veine porte, see Liver.