According to Dictionary.com, "scientific" means "of or pertaining to science or the sciences." The word can also mean "occupied or concerned with science," as in "scientific experts" or "the scientific community."
Scientific also means "regulated by or conforming to the principles of exact science," as in "scientific procedures." Finally, the word can refer to anything that is "systematic or accurate in the manner of an exact science." One might describe the precision construction of a Swiss watch or the meticulous measurements of a master carpenter as scientific. The word entered English in 1589 and originates from the Middle French word "scientifique," which itself derives from the Medieval Latin word "scientificus," meaning "pertaining to science."