Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.


tr.v. cir·cum·val·lat·ed, cir·cum·val·lat·ing, cir·cum·val·lates
To surround with or as if with a rampart.
1. (also -ĭt) Surrounded with or as if with a rampart.
2. Anatomy Surrounded by a ridge or raised, wall-like structure.

[Latin circumvallāre, circumvallāt- : circum-, circum- + vallum, rampart with palisades (from vallus, post, stake).]

cir′cum·val·la′tion n.
References in classic literature ?
But when once they passed the line of circumvallation and found themselves in the open plain, D'Artagnan, who was completely ignorant of what was going forward, thought it was time to demand an explanation.
The Saxon architect had exhausted his art in rendering the main keep defensible, and there was no other circumvallation than a rude barrier of palisades.
Circumvallation may be associated with bleeding in early pregnancy and may show iron deposition in the membranes, sometimes with a yellow-brown or brown discoloration.