The most complete glossary of backgammon terms
One turn by one player, a measure of how far a player (or computer program) looks ahead when selecting a play or evaluating a position. See post by JP White. Note: There is no agreement in the backgammon community as to whether plies are counted starting at 0 (as GNU Backgammon does it) or starting at 1 (as Snowie does it). See this thread and this thread concerning the controversy.
An early plastic, similar to bakelite, that was popular in the 1930's and 40's in the creation of backgammon playing pieces.