Inner sill Synonyms

Definitions for Inner

(adjective) situated farther in
(adjective) of or relating to the mind
(adjective) located inward

IS abbreviation

IS is an abbreviation for Inner Sill

What does IS stand for?

IS stands for "Inner Sill"

Sill replaced

Definitions for Sill

(noun) structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure
(noun) (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock