A flat sieve is a tool used for sifting flour and other dry ingredients. Synonyms for flat sieve include mesh strainer, colander, screen, sifter, wire sieve, and sieve. A mesh strainer is a type of flat sieve with a fine mesh that can filter out small particles. A colander is a wider and shallower flat sieve commonly used for draining liquids from pasta and vegetables. A screen is a flat sieve with a woven or perforated surface used in soil analysis and gardening. A sifter is used for dry ingredients and has a crank or lever to operate. A wire sieve is a flat sieve made of metal wires and used in industrial and scientific applications.