A shelf or shelves for storing books for easy visual reference.
Silly.
A young herring.
The shaft or thill of a carriage.
A stratum of rock, especially an intrusive layer of igneous rock lying parallel to surrounding strata.
The inner edge of the bottom of an embrasure.
A threshold; horizontal structural member of a building near ground level on a foundation or pilings, or lying on the ground, and bearing the upright portion of a frame; a sill plate.
A threshold or brink across the bottom of a canal lock for the gates to shut against.
A raised area at the base of the nasal aperture in the skull.
A breast wall; window breast; horizontal brink which forms the base of a window.