The word "sectral" is spelled with a silent "s" at the beginning, followed by the letters "e", "c", "t", "r", "a", and "l". The correct pronunciation of "sectral" is /ˈsɛktrəl/. The "s" does not produce a sound, and the stress is on the second syllable, "tral". This word is often used as a brand name for the medication secobarbital, which is a short-acting barbiturate used to treat insomnia or as a pre-anesthetic prior to surgery.