poriomania (pÅrâ³ Ä-Å-mÄnâ² Ä-Ä) [Gr. poreia, walking, + mania, madness]
1 Refers to the bowler's motion that ends with the start of the delivery. 2  arm-swing: The arc of the bowling arm and hand from the swing to the backswing. 3  arrows: Targeting arrows that appear on the lane 12 to 16 feet beyond the foul line. 4  Also called darts.
For fifty years cricketers had bowled underarm; then cam along a bowler who introduced the round-arm or over-arm style we know today. It was greatly opposed at first, but one team that did bowl over-arm thrashed an All England team twice in three matches, it quickly became popular.