concentration gradient: meaning, definition, pronunciation and examples
C1/C2Technical/Scientific (Biology, Chemistry, Physics); Academic
Quick answer
What does “concentration gradient” mean?
A measurable difference in the concentration of a substance between two regions, typically driving the passive movement (diffusion) of that substance from the area of higher concentration to the area of lower concentration.
Audio
Pronunciation
Definition
Meaning and Definition
A measurable difference in the concentration of a substance between two regions, typically driving the passive movement (diffusion) of that substance from the area of higher concentration to the area of lower concentration.
In a broader conceptual sense, any gradual change in the density, intensity, or amount of a particular property across a defined space or system. This can be applied metaphorically to non-physical domains like information, wealth, or population density.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling follows national conventions (e.g., 'concentration' is spelled the same; related words may differ: 'behaviour' vs. 'behavior').
Connotations
Identical technical meaning. No cultural or connotative divergence.
Frequency
Equally frequent in relevant scientific and academic contexts in both regions.
Grammar
How to Use “concentration gradient” in a Sentence
[Substance] moves down/along/with the concentration gradient.[Process] establishes/maintains/uses a concentration gradient of [substance].A concentration gradient exists between [Region A] and [Region B].Vocabulary
Collocations
Examples
Examples of “concentration gradient” in a Sentence
verb
British English
- The ions will gradient down their concentration pathway. (Note: 'gradient' is not standardly used as a verb; this is a nonce construction.)
American English
- The system is designed to gradient the chemical across the membrane. (Note: 'gradient' is not standardly used as a verb; this is a nonce construction.)
adverb
British English
- The molecules moved gradiently. (Extremely rare/constructed)
American English
- It diffused gradient-wise. (Extremely rare/constructed)
adjective
British English
- The gradient-dependent transport was measured. (Derived adjective)
American English
- We observed a gradient-driven flow. (Derived adjective)
Usage
Meaning in Context
Business
Rarely used literally. Can be used metaphorically: 'There's a steep concentration gradient of tech talent between Silicon Valley and the Midwest.'
Academic
Core term in life sciences, chemistry, and physics. Used to explain osmosis, diffusion, and electrochemical potentials.
Everyday
Virtually never used in casual conversation.
Technical
Precise, quantitative term. Used in laboratory protocols, scientific papers, and engineering (e.g., chemical engineering).
Vocabulary
Synonyms of “concentration gradient”
Strong
Neutral
Weak
Vocabulary
Antonyms of “concentration gradient”
Watch out
Common Mistakes When Using “concentration gradient”
- Using 'concentration gradient' to describe active transport (which works *against* it).
- Saying 'high concentration gradient' to mean a large difference (correct: 'steep' or 'large' concentration gradient).
- Treating it as a general synonym for 'difference' outside of scientific contexts.
FAQ
Frequently Asked Questions
No, it is not energy itself. It is a *potential* that can be harnessed to do work (like diffusion), but maintaining or moving against it requires energy expenditure.
Conceptually, yes—this is a temperature gradient. The term 'concentration gradient' is specific to the amount of a substance per volume, but the principle of a gradient driving flow is similar.
The system has reached equilibrium. There is no net movement of the substance because it is uniformly distributed.
It is fundamental for processes like gas exchange in lungs/gills, nutrient absorption in intestines, nerve impulse transmission, and kidney function. Cells often use gradients to power other processes or as signals.
A measurable difference in the concentration of a substance between two regions, typically driving the passive movement (diffusion) of that substance from the area of higher concentration to the area of lower concentration.
Concentration gradient is usually technical/scientific (biology, chemistry, physics); academic in register.
Concentration gradient: in British English it is pronounced /ˌkɒnsənˈtreɪʃən ˈɡreɪdiənt/, and in American English it is pronounced /ˌkɑːnsənˈtreɪʃən ˈɡreɪdiənt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Go with the gradient (rare, technical slang)”
- “Uphill battle (metaphorically similar to moving against a gradient)”
Learning
Memory Aids
Mnemonic
Imagine a hill made of sugar cubes. The top is densely packed (high concentration), the bottom has few cubes (low concentration). Sugar cubes naturally tumble down the hill—this 'sugar hill' is your concentration gradient.
Conceptual Metaphor
A SLOPE or HILL of particles. Substances 'roll downhill' from crowded areas to less crowded areas.
Practice
Quiz
What does moving 'against the concentration gradient' require?