I. -ˈva-ˌlāt transitive verb
( -lat·ed ; -lat·ing )
Etymology: Latin circumvallatus, past participle of circumvallare to surround with siege works, from circum- + vallum rampart — more at wall
Date: circa 1798
: to surround by or as if by a rampart
• cir·cum·val·la·tion -ˌva-ˈlā-shən noun
II. -ˈva-ˌlāt, -ˈva-lət adjective
Date: circa 1852
: being any of approximately 12 large papillae near the back of the tongue each of which is surrounded with a marginal sulcus and supplied with taste buds responsive especially to bitter flavors