An item of furniture; a furnishing; a household implement; a piece of (especially scientific) equipment. Also (as a count noun): furniture; scientific apparatus.
Late 16th century; earliest use found in Philip Stubbes (c1555–c1610), pamphleteer. From classical Latin supellectilis (recorded in a 2nd-cent. epitome of a 1st-cent. grammarian), alteration (after adjectives in -ilis) of supellex.