players with an injury or disability which prevents them from bending sufficient to reach the ground. lignum vitae: refers to a type of natural hardwood material from a tree, used to make a bowl. Prior to the introduction of composite plastic materials, the predominant material for the manufacture of bowls today, lignum vitae was the dominant material used. line: is the directional arc that the bowl travels along from the point of delivery to the point it stops. For a draw bowl, the player will identify an aiming point when letting go of the bowl, such that it will travel along a pathway to end up as close as possible to his target, usually the jack. The line of the bowl will vary depending on the prevailing conditions of the green (heavy, fast), the bias of the bowl, and the desired finishing position. live bowl: after a bowl has been delivered and comes to rest, if it stops within the confines of the rink (or green for Crown Green bowls) it is considered live. if a bowl finishes in the ditch, or outside the rink boundary, it is considered a dead bowl . However, if the bowl has touched the jack, it remains a live bowl even if in the ditch, as long as it is within the boundary of the rink. M manager: in team games, a manager is appointed for each team, whose role is to fill in the scorecards, agree the match up of rinks between teams, tally the total scores of all rinks at the end of a game, and submit the result to the governing competition association. The manager may have other duties depending on the domestic regulations in place for a particular competition, and can include being the point of contact for a team in relation to decisions to stop play should adverse weather conditions affect play, but does not normally include adjudicating on the rules of bowls, which is handled by a designated umpire. mark: is the target or object that bowls are aimed at. In bowls the mark is the jack (a.k.a. kitty) marker: In a game of singles, a non playing bowler will assist the players by aligning the jack on the centre line after it has been rolled, answer questions asked by the players about the state of play, chalk bowls that become touchers, and keep the scorecard and scoreboard