Толковый словарь английского языка - perpendicular

I. adjective see: pendant Date: 14th century 1. standing at right angles to the plane of the horizon ; exactly upright, being at right angles to a given line or plane, extremely steep ; precipitous, of or relating to a medieval English Gothic style of architecture in which vertical lines predominate, relating to, uniting, or consisting of individuals of dissimilar type or on different levels, see: vertical ~ity noun ~ly adverb II. noun Date: 1571 a line at right angles to a line or plane (as of the horizon)