A peninsula (, "paene-": almost + "insular": island; also called a by land or bi-land) is a piece of land that is bordered by water on three sides but connected to mainland. The surrounding water is usually understood to belong to a single, contiguous body, but is not always explicitly defined as such. A peninsula can also be a headland (head), cape, island promontory, bill, point, or spit. Note that a point is generally considered a tapering piece of land projecting into a body of water that is less prominent than a cape. In English, the plural of peninsula is peninsulas or, less commonly, peninsulae.