Noun
crown green (plural crown greens)
The playing area used in crown green bowls; normally about 40 yards square that rises to a "crown" in the middle about 1 foot above the edges
A crown green at Edgworth, Lancashire There are many different ways to set up the game. Source: Internet
It is played on a bowling green which may be flat (for "flat-green bowls") or convex or uneven (for " crown green bowls "). Source: Internet