perpendicular

(pûrˌpən-dĭkˈyə-lər)

1. Mathematics Intersecting at or forming right angles.
2. Being at right angles to the horizontal; vertical. See Synonyms at vertical.
3. often Perpendicular Of or relating to a style of English Gothic architecture of the 14th and 15th centuries, characterized by emphasis of the vertical element.

1. Mathematics A line or plane perpendicular to a given line or plane.
2. A perpendicular position.
3. A device, such as a plumb line, used in marking the vertical from a given point.
4. A vertical or nearly vertical line or plane.

Related Forms:

• perˌpen·dicˌu·larˈi·ty (-lărˈĭ-tē) noun

• perˌpen·dicˈu·lar·ly adverb