In anatomy, a ligament is the fibrous tissue that connects bones to other bones and is also known as articular ligament, articular larua,fibrous ligament, or true ligament.

Ligament can also refer to:

The study of ligaments is known as desmology (from Greek δεσμός, desmos, "string"; and -λογία, -logia).

Ligaments are similar to tendons and fasciae as they are all made of collagen except that ligaments join one bone to another bone, tendons join muscle to bone and fasciae connect muscles to other muscles.

"Ligament" most commonly refers to a band of tough, fibrous dense regular connective tissue comprising attenuated collagenous fibers. Ligaments connect bones to other bones to form a joint. They do not connect muscles to bones; that is the job of tendons. Some ligaments limit the mobility of articulations, or prevent certain movements altogether.

Capsular ligaments are part of the articular capsule that surrounds synovial joints. They act as mechanical reinforcements. Extra-capsular ligaments join together and provide joint stability. Intra-capsular ligaments, which are much less common,^{[citation needed]} also provide stability but permit a far larger range of motion. Cruciate ligaments occur in pairs.

Thomas Edward John Jr. (born May 22, 1943) is a former pitcher in Major League Baseball whose 288 career victories rank as the seventh highest total among left-handers in major league history. He is also known for the revolutionary surgery, now named after him, which was performed on a damaged ligament in his pitching arm.

John was an outstanding basketball player at Gerstmeyer High School in Terre Haute, Indiana, where he held the city single game scoring record. Choosing baseball when he realized he would not go on to play professional basketball, John signed with the Cleveland Indians and made his major league debut at twenty years-old in 1963. Following two partial seasons with the Indians, John showed occasional excellence during seven respectable years as a starting pitcher with the Chicago White Sox. However, it was a trade before the 1972 season to the Los Angeles Dodgers for mercurial slugger Dick Allen that began a skein of John's most famous years, first with the Dodgers and subsequently with the New York Yankees, where he posted a pair of 20-win seasons and was twice an All-Star. John was also named an All-Star in 1968 with the White Sox and 1978 with LA. He played in all three Yankees vs. Dodgers World Series of his era (1977, 1978 and 1981), having switched over to the Yankees by the time the Dodgers won the Series in 1981.