Per`pen`dic´u`lar

a. | 1. | Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth. | |||

2. | (Geom.) At right angles to a given line or surface;
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n. | 1. | A line at right angles to the plane of the horizon; a vertical line or direction. | |||

2. | (Geom.) A line or plane falling at right angles on another line or surface, or making equal angles with it on each side. |

Noun | 1. | perpendicular - a straight line at right angles to another line |

2. | perpendicular - a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting | |

3. | perpendicular - a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given pointSynonyms: plumb line | |

4. | perpendicular - an extremely steep face | |

Adj. | 1. | perpendicular - intersecting at or forming right angles; "the axes are perpendicular to each other"Antonyms: oblique - slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angular; "the oblique rays of the winter sun"; "acute and obtuse angles are oblique angles"; "the axis of an oblique cone is not perpendicular to its base" parallel - being everywhere equidistant and not intersecting; "parallel lines never converge"; "concentric circles are parallel"; "dancers in two parallel rows" |

2. | perpendicular - at right angles to the plane of the horizon or a base line; "a vertical camera angle"; "the monument consists of two vertical pillars supporting a horizontal slab"; "measure the perpendicular height"Synonyms: vertical | |

3. | perpendicular - extremely steep; "the great perpendicular face of the cliff" |

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Peronospora hyoscyami

Peronospora tabacina

Peronosporaceae

Peronosporales

Perorate

Peroration

peroxidase

Peroxidation

Peroxide

peroxide blond

peroxide blonde

Peroxidize

Perpend

Perpend stone

Perpender

Perpendicle

**-- Perpendicular --**

perpendicular style

Perpendicularity

Perpendicularly

Perpension

Perpensity

Perpent stone

Perpession

Perpetrable

Perpetrate

Perpetration

Perpetrator

Perpetua lex est

Perpetuable

Perpetual

Perpetual calendar

Perpetual curacy

Peronospora tabacina

Peronosporaceae

Peronosporales

Perorate

Peroration

peroxidase

Peroxidation

Peroxide

peroxide blond

peroxide blonde

Peroxidize

Perpend

Perpend stone

Perpender

Perpendicle

perpendicular style

Perpendicularity

Perpendicularly

Perpension

Perpensity

Perpent stone

Perpession

Perpetrable

Perpetrate

Perpetration

Perpetrator

Perpetua lex est

Perpetuable

Perpetual

Perpetual calendar

Perpetual curacy