Definition of head ball

This is the apex ball in the triangle, racked on the foot spot in a normal game.

24 Random Essential Billiards Terms

A players skill level, ball advantage or match advantage when using a handicapping system.
A thin sheet of rigid material in the size and shape of a physical ball rack (e.g. a diamond for nine-ball), with holes drilled though it, which is used to make permanent divots in the cloth of the table, one at a time for each ball in the racking pattern, by placing a ball in one of the holes in the carefully placed template and tapping it sharply from above to create the cloth indentation. The holes are spaced slightly closer than the regulation ball width of 21/2 inch (57.15 mm) apart, so that when the balls settle partially into their divots, the outer sides of these indentations create ball-on-ball pressure, pushing the balls together tightly. The purpose of the template is to do away with using a physical rack, with racking instead being performed simply by placing the balls into position, and the divots aligning them into the tightest possible formation automatically. This prevents accidental loose racks, and also thwarts the possibility of cheating by carefully manipulating the ball positions while racking. The European Pocket Billiard Federation (EPBF, Europe's WPA affiliate organization) has adopted this racking technique for its professional Euro-Tour event series.
This is the state after which the person returning the break has had the opportunity to catch and even the field after the breakers advantage.
To contact the chosen object ball in such a way to make it bank off a rail before being pocketed.
Same as gutter table. A table with a ball return system, as opposed to a drop pocket table.
This is the point on the object ball where the cue exactly impacts or the point at which two balls touch when they impact.
Same as gapper
Any shot that intentionally accounts for the elasticity of the cushions to allow a ball to bank past an otherwise blocking ball. The moving ball will sink in to the cushion very near the blocking ball giving it sufficient space to get past it or kiss off the back side of it.
The BCA Pool League is one of the major amateur pool leagues in the United States and is present in over a dozen other countries outside the U.S., with a significant presence in Canada
This is a shot where the cue ball double kisses in order to direct the object ball toward the pocket.
Also spot-stroke, spot hazard. A form of nurse shot in English billiards, in which the red ball, which must be spotted to a specific location after every time it is potted before another shot is taken, is potted in such as way as to leave the cue ball in position to repeat the same shot, permitting a skilled player to rack up many points in a single break (series of shots in one visit).
Slang for the cue ball.
This is placed on a ball by hitting it slightly below center. This action makes the ball travel in a motion against its originally hit direction.
Shooting at an object ball that is already in motion at the moment of shooting and cue ball impact; illegal in most games and usually only seen in exhibition/trick shots.
The normal phenomenon where the object ball is pushed in a direction very slightly off the pure contact angle between the two balls. Caused by the friction imparted by the first ball sliding past or rotating against the other ball.
The triangular device, generally plastic, used to group the balls in a pyramid form prior to the beginning of a game.
This is a ball that is left in a position that allows an easy shot, while time is spent working with other balls to better your position in the game.
This is when you strike a cue ball off center to gain control on the movement on the cue ball.
A rule in blackball whereby after an opponent has faulted and thus yielded two shots, if the incoming shooter pots a ball on the first shot, (s)he is still allowed to miss in a later shot and take a second shot in-hand (from the "D" or from baulk, or if the opponent potted the cue ball, from anywhere)—even on the black, in most variants. Also called the "two visits" rule; i.e., the two penalty shots are considered independent visits to the table, and the limiting variants discussed at two shots below cannot logically apply.
The ball required to guarantee victory in a match. Sometimes used figuratively to mean the last difficult ball required (chiefly British and usually used in multi-frame matches, particularly snooker).
This is a kind of cue made of only two pieces of wood, and joined together using an advanced adhesive along the points of the cue. This connection gives the cue a flawless look and a fluid feel when shooting.
A barrel is how much money per game a player is betting. As in, "I have ten barrels at $20 a game".
A pool room may refer to an establishment that is the same as a pool hall. A private residence may also have a pool room. That would be a room in a house or a recreation room in an apartment building, hotel or condominium complex that has a room that the main activity is dedicated to playing pool.
Also known as slop. To pocket a ball by luck; "he ratted in the 9 ball"; usually employed disapprovingly.