Synonyms: sill
Definition: structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure
Similar words: structural member
Definition: support that is a constituent part of any structure or building
Synonyms: sill
Definition: (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock
Definition: a lump or mass of hard consolidated mineral matter
Usage: he threw a rock at me