Done for both fairness and the safety of the batsmen. Often shortened simply to light. See also offer the light. Baggy green
A cricket cap of myrtle green colour, which has been worn by Australian Test cricketers since around 1900. The cap is a symbol of Australian cricket, and the term is strongly associated with national cricketing pride. Bail
One of the two small pieces of wood that lie on top of the stumps to form the wicket. Ball
1. The spherical object which the bowler propels towards the batsman, who may attempt to hit it with the bat. Constructed of leather stiched around a cork core. A red ball is used in timed matches (or a pink ball for day/night cricket), whilst a white ball is used in limited overs cricket. 2. A single delivery. Each over contains six (legal) balls. Ball tampering
Illegally modifying the condition of the ball, usually by a fielder to facilitate swing bowling. Ball tampering is a form of cheating, so accusations are often controversial. Ball tracking
A computer vision system that determines the location of the ball, tracks its motion, and predicts its future trajectory. Used by the third umpire in the decision review system to assess LBW appeals, and by coaches or commentators to analyse player performances. Common brands include Hawk-Eye and Eagle-Eye, which are sometimes used as genericised trademarks for the concept. Bang (it) in
To bowl a delivery on a shorter length with additional speed and force. The bowler is said to be "bending their back" when banging it in.
Hereditary spherocytosis (HS) is a congenital hemolytic disorder, wherein a genetic mutation coding for a structural membrane protein phenotype leads to a spherical shaping of erythrocytic cellular morphology. As erythrocytes are sphere-shaped (spherocytosis), rather than the normal biconcave disk-shaped, their morphology interferes with these cells abilities to be flexible during circulation throughout the entirety of the body -  arteries, arterioles, capillaries, venules, veins, and organs. This difference in shape also makes the red blood cells more prone to rupture under osmotic and/or mechanical stress. Cells with these dysfunctional proteins are degraded in the spleen, which leads to a shortage of erythrocytes resulting in hemolytic anemia. HS was first described in 1871, and is the most common cause of inherited hemolysis in populations of northern European descent, with an incidence of 1 in 5000 births. The clinical severity of HS varies from mild (symptom-free carrier), to moderate (anemic, jaundiced, and with splenomegaly), to severe (hemolytic crisis, in-utero hydrops fetalis), because HS is caused by genetic mutations in a multitude of structural membrane proteins and exhibits incomplete penetrance in its expression.Early symptoms include anemia, jaundice, splenomegaly, and fatigue. Acute cases can threaten to cause hypoxia secondary to anemia and acute kernicterus through high blood levels of bilirubin, particularly in newborns. Most cases can be detected soon after birth. Testing for HS is available for the children of affected adults. Occasionally, the disease will go unnoticed until the child is about 4 or 5 years of age.