A batsman may challenge a decision of out, and the captain of the fielding side may challenge a not out decision. Teams are limited in the number of unsuccessful reviews per inning; if they have reached that limit they are permitted no further reviews. The umpires themselves can review run out, caught and no ball decisions, or whether a shot has scored a boundary. Only available in televised games, because the necessary equipment is provided by the broadcaster. Umpires call
Outcome of the Umpire Decision Review System if the third umpire finds the evidence inconclusive, or within the stated margin of error. The original umpires decision stands, but the review does not count towards the team limit on unsuccessful reviews. Uncapped
a player who has never played at the international level (see "cap (sense 2)".) Underarm
the action of bowling with the arm swinging from behind the body in a downswing arc and then releasing the ball on the up swing without bending the elbow. This type of bowling is now illegal in formal cricket, but commonly played in informal types of cricket. Compare with overarm. Under-spin (also back-spin)
backward rotation on the ball, causing it to decrease speed immediately after pitching. Unorthodox
1.  a shot played not in the accepted "textbook" manner, often with a degree of improvisation. 2.  a left arm spin bowler who spins the ball with their wrist in a similar manner to a right-arm leg-spin bowler. This imparts spin in the same direction as a right-handed off-spin bowler. See: Left-arm unorthodox spin.
Gorham and others speculated that such a change in the bone chemistry might cause an imbalance in the rate of osteoclast to osteoblast activity such that more bone is dissolved than is replaced. Beginning in the 1990s, elevated levels of a protein called interleukin-6 (IL-6) being detected in people with the disease were reported, leading some to suggest that increased levels of IL-6 and vascular endothelial growth factor (VEGF) may contribute to the chemical changes Gorham and others believed were the cause of this type of osteolysis.In 1999, Möller and colleagues concluded, "The Gorham-Stout syndrome may be, essentially, a monocentric bone disease with a focally increased bone resorption due to an increased number of paracrine – or autocrine – stimulated hyperactive osteoclasts. The resorbed bone is replaced by a markedly vascularized  fibrous tissue. The apparent contradiction concerning the presence or absence or the number of osteoclasts, may be explained by the different phases of the syndrome." They further stated that their histopathological study provided good evidence that osteolytic changes seen in Gorhams disease are the result of hyperactive osteoclastic bone. However, others have concluded that lymphangiomatosis and Gorhams disease should be considered as a spectrum of disease rather than separate diseases.While a consensus exists that Gorhams is caused by deranged osteoclastic activity, no conclusive evidence has been found as to what causes this behavior to begin.