Merriam-Webster Collegiate Dictionary - tunic

 noun  Etymology: Old English ~e, from Latin ~a, of Semitic origin; akin to Hebrew kuttoneth coat  Date: 12th century  1.  a. a simple slip-on garment made with or without sleeves and usually knee-length or longer, belted at the waist, and worn as an under or outer garment by men and women of ancient Greece and Rome  b. surcoat  2. an enclosing or covering membrane or tissue the ~ of a seed  3. a long usually plain close-fitting jacket with high collar worn especially as part of a uniform  4. ~le  5.  a. a short overskirt  b. a hip-length or longer blouse or jacket