Antiparallel vs. Perpendicular — What's the Difference?

Of or relating to two adjacent molecules whose sequences of atoms or other elements run in opposite directions

In elementary geometry, the property of being perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects.

(mathematics) (of vectors) Parallel but in opposite directions.

At an angle of 90° to a given line, plane, or surface or to the ground

(biochemistry) Describing the orientations of the two strands of DNA.

Denoting the latest stage of English Gothic church architecture, prevalent from the late 14th to mid 16th centuries and characterized by broad arches, elaborate fan vaulting, and large windows with vertical tracery

(biochemistry) Describing two beta strands comprising a protein's secondary structure that are aligned and hydrogen bonded but where the vectors describing the amino- and carboxy-terminal ends of each strand are oriented 180° relative to one another.

A straight line at an angle of 90° to a given line, plane, or surface

(geometry) A line that forms equal angles with two other lines, but in opposite directions.

(Mathematics) Intersecting at or forming right angles.

Running in a contrary direction.

Being at right angles to the horizontal; vertical.

(especially of vectors) parallel but oppositely directed;

Often Perpendicular Of or relating to a style of English Gothic architecture of the 1300s and 1400s, characterized by the use of fan vaulting and broad windows with many mullions.

In a perpendicular position.

(Mathematics) A line or plane perpendicular to a given line or plane.

A perpendicular position.

A device, such as a plumb line, that is used in marking the vertical from a given point.

A vertical or nearly vertical line or plane.

(geometry) At or forming a right angle (to something).

Exactly upright; extending in a straight line toward the centre of the earth, etc.

Independent of or irrelevant to each other; orthogonal.

(geometry) A line or plane that is perpendicular to another.

A device such as a plumb line that is used in making or marking a perpendicular line.

A meal eaten at a tavern bar while standing up.

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.

At right angles to a given line or surface; as, the line ad is perpendicular to the line bc.

A line at right angles to the plane of the horizon; a vertical line or direction.

A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.

A straight line at right angles to another line

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

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 point

An extremely steep face

Intersecting at or forming right angles;

At right angles to the plane of the horizon or a base line;

Extremely steep;