minor axis: meaning, definition, pronunciation and examples
C2Technical / Formal
Quick answer
What does “minor axis” mean?
In geometry, the shorter axis of an ellipse or ellipsoid, perpendicular to the longer major axis.
Audio
Pronunciation
Definition
Meaning and Definition
In geometry, the shorter axis of an ellipse or ellipsoid, perpendicular to the longer major axis.
Any secondary or subordinate line, dimension, or principle that is shorter or of lesser importance than a primary one; used metaphorically in various fields (e.g., data analysis, engineering, design).
Dialectal Variation
British vs American Usage
Differences
No significant differences in definition or usage. Spelling conventions follow standard BrE/AmE patterns for accompanying text (e.g., 'centre' vs. 'center').
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low-frequency and confined to technical contexts in both regions.
Grammar
How to Use “minor axis” in a Sentence
The minor axis of [an ellipse/an ellipsoid][Ellipse/Ellipsoid] has a minor axis [of length X]The minor axis is [perpendicular/shorter]Vocabulary
Collocations
Examples
Examples of “minor axis” in a Sentence
verb
British English
- [No standard verb form]
American English
- [No standard verb form]
adverb
British English
- [No standard adverb form]
American English
- [No standard adverb form]
adjective
British English
- The minor-axis length was critical for the architectural model.
American English
- The minor-axis dimension is specified in the blueprint.
Usage
Meaning in Context
Business
Rare. Potentially used metaphorically in data analysis (e.g., 'The minor axis of the growth chart represents quarterly fluctuations').
Academic
Common in mathematics, physics, engineering, astronomy, and statistics textbooks and papers when describing elliptical shapes or principal component analysis.
Everyday
Extremely rare. Would only appear in specific DIY, crafting, or hobbyist contexts involving precise measurements of oval shapes.
Technical
Standard term in geometry, computer graphics, orbital mechanics (describing orbits), and structural engineering.
Vocabulary
Synonyms of “minor axis”
Strong
Neutral
Weak
Vocabulary
Antonyms of “minor axis”
Watch out
Common Mistakes When Using “minor axis”
- Using 'minor axis' to refer to the longer axis. Confusing 'minor' with 'semi-minor axis' (half the length of the minor axis). Incorrectly stating the minor axis is parallel to the major axis.
FAQ
Frequently Asked Questions
No. The orientation of the minor axis depends on the ellipse. It is always perpendicular to the major axis. If the major axis is vertical, the minor axis is horizontal, and vice versa.
The minor axis is the full diameter (the entire line segment) through the centre of the ellipse at its narrowest width. The semi-minor axis is exactly half of this length—the distance from the centre to the ellipse's edge along the minor axis.
Yes, but it's a metaphorical extension. In data science, for example, a 'minor axis' might refer to a dimension of lesser variance or importance in a dataset.
For a standard ellipse equation x²/a² + y²/b² = 1, where a > b, the length of the minor axis is 2b. The value 'b' is the semi-minor axis length.
In geometry, the shorter axis of an ellipse or ellipsoid, perpendicular to the longer major axis.
Minor axis is usually technical / formal in register.
Minor axis: in British English it is pronounced /ˈmaɪ.nər ˈæk.sɪs/, and in American English it is pronounced /ˈmaɪ.nɚ ˈæk.sɪs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms for this technical term]”
Learning
Memory Aids
Mnemonic
Think 'MINor' is the 'MINimum' length axis. In an egg shape, the minor axis is the shorter line across the narrow middle.
Conceptual Metaphor
IMPORTANCE IS SIZE / CENTRALITY IS PRIMARY. The 'minor' axis is metaphorically the less important or secondary dimension.
Practice
Quiz
What is the relationship between the major and minor axes of an ellipse?