horosphere

== English == === Etymology === A modern scientific coinage, probably from a Latinized spelling of Ancient Greek ὅρος (hóros, “boundary”) (not to be confused with ὧρος (hôros, “year”), which gave rise to many time-related terms) + -sphere === Noun === horosphere (plural horospheres) An n − 1 {\displaystyle n-1} -dimensional hyperplane in hyperbolic n {\displaystyle n} -dimensional space: it is (in the Poincaré disk) Euclidean-tangent at infinity to the boundary sphere or (in the upper-half-space model) Euclidean-parallel to the boundary hyperplane. === See also === horosphere on Wikipedia.Wikipedia === Anagrams === rheophores