fluxion: meaning, definition, pronunciation and examples
C2/RareHighly technical (mathematics, history of science), archaic, literary
Quick answer
What does “fluxion” mean?
The action or process of flowing or changing continuously.
Audio
Pronunciation
Definition
Meaning and Definition
The action or process of flowing or changing continuously; a derivative in early calculus, representing the rate of change of a variable.
1. In historical mathematics (Newtonian calculus), the instantaneous rate of change of a variable, akin to a derivative. 2. In medicine/physiology, an abnormal discharge or flow of fluid. 3. In general use, a state of continuous change or transition. 4. In literature/philosophy, a symbol of impermanence or the Heraclitean concept of universal change.
Dialectal Variation
British vs American Usage
Differences
No significant regional difference in usage. The word is equally rare and technical in both varieties.
Connotations
Connotes historical academic discourse, particularly the history of mathematics and science. May sound archaic or deliberately erudite.
Frequency
Extremely low frequency in both corpora. Likely only encountered in specialized historical texts or poetic/literary works.
Grammar
How to Use “fluxion” in a Sentence
the fluxion of [variable/quantity]calculate the fluxionin a state of fluxionVocabulary
Collocations
Examples
Examples of “fluxion” in a Sentence
noun
British English
- Newton's concept of the fluxion was foundational for his calculus.
- The patient suffered from a fluxion of humours, according to the medieval physician.
- The poem described the constant fluxion of human fortune.
American English
- In his papers, he referred to the velocity as a fluxion.
- The theory dealt with the fluxion of quantities over time.
- Her thoughts were in a state of perpetual fluxion.
Usage
Meaning in Context
Business
Virtually never used. 'Market flux' or 'volatility' would be used instead.
Academic
Used almost exclusively in historical contexts discussing Newton/Leibniz and the development of calculus.
Everyday
Not used. 'Change' or 'flow' are the common terms.
Technical
Archaic/obsolete in modern mathematics and physics. Might appear in medical literature for 'flow of humors' but very rare.
Vocabulary
Synonyms of “fluxion”
Strong
Neutral
Vocabulary
Antonyms of “fluxion”
Watch out
Common Mistakes When Using “fluxion”
- Confusing it with 'flux' (more common noun) or 'fluction' (rare, similar). Using it in modern mathematical contexts instead of 'derivative'. Incorrectly using it to mean 'a large amount'.
FAQ
Frequently Asked Questions
No, it is a historical term coined by Isaac Newton. The modern equivalent is the 'derivative'.
'Flux' is a general state of flow or change. 'Fluxion' specifically refers to the *rate* or *process* of that flow/change, and is strongly associated with Newton's calculus.
It would sound very archaic and pretentious. Use 'flow', 'change', or 'flux' instead for general communication.
Primarily, but it had limited use in medicine (for fluid discharge) and in literary/philosophical contexts to mean a continuous process of change.
The action or process of flowing or changing continuously.
Fluxion is usually highly technical (mathematics, history of science), archaic, literary in register.
Fluxion: in British English it is pronounced /ˈflʌkʃ(ə)n/, and in American English it is pronounced /ˈfləkʃən/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Method of Fluxions (Newton's early calculus)”
Learning
Memory Aids
Mnemonic
Think of 'flux' (meaning flow/change) + '-ion' (a process or result). A 'flux-ion' is the process or result of flowing change, especially in Newton's maths.
Conceptual Metaphor
CHANGE IS FLOW (The rate of change is the speed of a flowing river). TIME IS A FLOWING RIVER (fluxion of time).
Practice
Quiz
In modern terminology, a 'fluxion' is most accurately replaced by which word?