Mŭd'-sill, n.
n. The lowest sill of a structure, usually embedded in the soil; the lowest timbers of a house; also, that sill or timber of a bridge which is laid at the bottom of the water. See SILL.
n. The lowest sill of a structure, usually embedded in the soil; the lowest timbers of a house; also, that sill or timber of a bridge which is laid at the bottom of the water. See SILL.