halfspace

== English == === Etymology === From half +‎ space. === Pronunciation === === Noun === halfspace (plural halfspaces) (geometry) Either of the two parts of a three-dimensional object cut by a two-dimensional plane (geology) A simple mathematical model of the structure of the Earth, as used in seismology. ==== See also ==== Sense 1. Geometry halfspace on Wikipedia.Wikipedia === Anagrams === halfpaces