discriminant: meaning, definition, pronunciation and examples
C2Technical / Academic
Quick answer
What does “discriminant” mean?
A mathematical expression or parameter used to determine the nature or number of solutions of an equation.
Audio
Pronunciation
Definition
Meaning and Definition
A mathematical expression or parameter used to determine the nature or number of solutions of an equation.
In algebra, the discriminant of a polynomial equation (especially quadratic) is a function of its coefficients that provides information about its roots. In a broader context, it can refer to any distinguishing feature or factor used for classification or making distinctions.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling of related words (e.g., 'analysing' vs. 'analyzing') may vary, but 'discriminant' itself is spelled identically.
Connotations
Neutral and purely technical in both dialects.
Frequency
Extremely low frequency in general language but standard within academic and technical registers worldwide.
Grammar
How to Use “discriminant” in a Sentence
The discriminant of [polynomial/equation] is [value].Calculate the discriminant.If the discriminant is positive...In discriminant analysis, ...Vocabulary
Collocations
Examples
Examples of “discriminant” in a Sentence
adjective
British English
- The discriminant value was crucial for the proof.
American English
- Discriminant analysis is a key statistical method.
Usage
Meaning in Context
Business
Rare; only in advanced analytics or data science contexts (e.g., 'discriminant analysis for customer segmentation').
Academic
Primary domain. Used in mathematics, algebra, statistics, and engineering courses and literature.
Everyday
Virtually never used.
Technical
Core technical term in mathematics, physics, computer algorithms (e.g., machine learning), and signal processing.
Vocabulary
Synonyms of “discriminant”
Neutral
Watch out
Common Mistakes When Using “discriminant”
- Confusing 'discriminant' with 'discrimination' (social context).
- Misspelling as 'discriminent' or 'discriminante'.
- Using it outside of a technical/mathematical context.
FAQ
Frequently Asked Questions
No. 'Discriminant' is a precise mathematical term. 'Discrimination' refers to the unjust treatment of people or, more generally, the ability to recognize distinctions.
Yes, primarily in technical compounds like 'discriminant function' or 'discriminant analysis'.
Rarely. Its primary use is in mathematics and related fields (stats, engineering). Any other use is a direct extension of its mathematical meaning.
UK: /dɪˈskrɪmɪnənt/ (stress on 'scrim'). US: /dɪˈskrɪmənənt/ (with a schwa in the third syllable).
A mathematical expression or parameter used to determine the nature or number of solutions of an equation.
Discriminant is usually technical / academic in register.
Learning
Memory Aids
Mnemonic
Think: 'DISCRIMINANT' helps DISCRIMINATE between different types of solutions (real, repeated, complex).
Conceptual Metaphor
A LITMUS TEST for equations (determines their character).
Practice
Quiz
What does a negative discriminant indicate for a quadratic equation?