Imaginary line

Imaginary line

In general, an imaginary line is any sort of line that has only an abstract definition, and does not exist in fact.

As a geographical concept, an imaginary line may serve as an arbitrary division (such as a border). It may also be a standardized mark that serves as a measurement or point of reference (such as a circle of latitude or the Prime Meridian).


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  • Imaginary line (mathematics) — In geometry, an imaginary line is a straight line that only contains one real point. It can be proven that this point is the intersection point with the conjugated line.It is a special case of an imaginary curve.It can be proven that there exists …   Wikipedia

  • line of sight — line of direct vision, imaginary line that demonstrates what can be seen; imaginary straight line between one object and another …   English contemporary dictionary

  • line of scrimmage American Football — the imaginary line separating the teams at the beginning of a play. → line …   English new terms dictionary

  • line of scrimmage — ☆ line of scrimmage n. Football an imaginary line, parallel to the goal lines, on which the ball rests at the start of each play and on either side of which the teams line up …   English World dictionary

  • line of scrimmage — noun uncount in football, an imaginary line between the two teams that passes through the ball to the two sides of the playing field …   Usage of the words and phrases in modern English

  • line of scrimmage — line′ of scrim′mage n. spo an imaginary line on a football field, parallel to the goal lines, along which opposing teams face each other at the beginning of each play • Etymology: 1905–10 …   From formal English to slang

  • line of sight — noun an imaginary straight line along which an observer looks • Syn: ↑line of vision • Hypernyms: ↑line * * * 1. or line of sighting : a linear projection toward a target of the straight line obtained when the sights of a firearm are in perfect… …   Useful english dictionary

  • line of force — noun an imaginary line in a field of force; direction of the line at any point is the direction of the force at that point • Syn: ↑field line • Hypernyms: ↑line • Hyponyms: ↑electrical line of force, ↑magnetic line of force * * * …   Useful english dictionary

  • line — line1 W1S1 [laın] n ▬▬▬▬▬▬▬ 1¦(on paper/on the ground)¦ 2¦(between two areas)¦ 3¦(of people/things)¦ 4¦(direction)¦ 5¦(on your face)¦ 6¦(phone)¦ 7¦(for trains)¦ 8¦(between two types of thing)¦ 9¦(shape/edge)¦ 10¦(w …   Dictionary of contemporary English

  • line — 1 noun LONG THIN MARK 1 (C) a long thin, usually continuous mark on a surface: A wiggly line showed where the river was. | straight line: Can you draw a straight line? | dotted line (=a broken straight line drawn or printed on paper): Sign your… …   Longman dictionary of contemporary English

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