Denoting a structure surrounded by a wall, as the c. (vallate) papillae of the tongue. [circum- + L. vallum, wall]
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cir·cum·val·late .sər-kəm-'val-.āt, -'val-ət adj enclosed by a ridge of tissue
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cir·cum·val·late (sur″kəm-valґāt) [circum- + vallate] surrounded by a trench or by a ridge; see papillae vallatae, under papilla.Medical dictionary. 2011.