geodesic line: meaning, definition, pronunciation and examples
C2+ / Very LowTechnical/Scientific
Quick answer
What does “geodesic line” mean?
The shortest possible path between two points on a curved surface or in a curved space, analogous to a straight line on a flat plane.
Audio
Pronunciation
Definition
Meaning and Definition
The shortest possible path between two points on a curved surface or in a curved space, analogous to a straight line on a flat plane.
A concept from geometry and physics that describes an extremal path, often related to the structure of spacetime in general relativity or the optimization of routes on a sphere.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or orthographic differences. The term is identical in both variants.
Connotations
Purely technical, no connotative difference.
Frequency
Equally rare and specialised in both dialects.
Grammar
How to Use “geodesic line” in a Sentence
The geodesic line [between X and Y]A geodesic line [on a surface]To calculate/follow the geodesic lineVocabulary
Collocations
Examples
Examples of “geodesic line” in a Sentence
verb
British English
- The algorithm geodetically computes the path.
- (Note: 'geodesic' is not a verb. Related adverbial form 'geodetically' is hyper-technical.)
American English
- The software geodesically maps the route.
- (Note: 'geodesic' is not a verb. Related adverbial form 'geodesically' is hyper-technical.)
adverb
British English
- The signal travelled geodetically across the curved network.
American English
- The path was calculated geodesically for maximum efficiency.
adjective
British English
- They studied the geodesic properties of the manifold.
American English
- The geodesic structure of spacetime is fundamental to relativity.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Core term in advanced geometry, differential geometry, general relativity, and geospatial sciences.
Everyday
Extremely rare. Might be encountered in popular science contexts.
Technical
The primary context. Used in mathematics, physics (especially cosmology), cartography, and computer graphics.
Vocabulary
Synonyms of “geodesic line”
Strong
Neutral
Weak
Vocabulary
Antonyms of “geodesic line”
Watch out
Common Mistakes When Using “geodesic line”
- Mispronouncing 'geodesic' as /'dʒi:oʊdɪk/ or /'gɛodɛsɪk/.
- Using it to refer to any curved line, rather than specifically the *shortest* path on a curved surface.
- Confusing 'geodesic line' with 'great circle' (a geodesic line on a perfect sphere *is* a great circle arc, but the terms are not equivalent on arbitrary surfaces).
FAQ
Frequently Asked Questions
On a perfectly flat plane, yes. On any curved surface or in curved space, a geodesic line is the generalisation of a straight line—it is the 'straightest' or shortest possible path.
The most common example is the flight path of a long-distance aeroplane, which appears as a curve on a flat map but is a geodesic (segment of a great circle) on the spherical Earth.
In precise modern use, 'geodesic' relates to the abstract mathematical concept of shortest paths. 'Geodetic' (or 'geodesy') relates to the practical science of measuring the Earth's shape and gravitational field. They are often conflated in non-technical language.
Yes. On some surfaces, like a sphere, you can start walking in a straight line (a great circle) and eventually return to your starting point, creating a closed geodesic.
The shortest possible path between two points on a curved surface or in a curved space, analogous to a straight line on a flat plane.
Geodesic line is usually technical/scientific in register.
Geodesic line: in British English it is pronounced /ˌdʒiːə(ʊ)ˈdɛsɪk laɪn/, and in American English it is pronounced /ˌdʒiːoʊˈdɛsɪk laɪn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Imagine a globe and a string pulled taut between two cities; the string lies along a GEOdesic LINE, the GEOgraphically shortest LINE.
Conceptual Metaphor
THE SHORTEST PATH IS A STRAIGHT LINE (extended to curved contexts).
Practice
Quiz
What is the primary defining characteristic of a geodesic line?