degranulation
Very RareTechnical/Scientific (Biology, Medicine, Immunology)
Definition
Meaning
The process by which a cell (especially a mast cell or granulocyte) releases the contents of its granules (small particles containing chemical mediators) into the surrounding tissue.
The specific biological process of granule secretion from a cell, often triggering inflammatory or immune responses.
Linguistics
Semantic Notes
Refers exclusively to a cellular biological process. It is a count noun (e.g., 'the degranulation was observed') but is almost always used in technical contexts describing the process itself.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences; the term is identical and used identically in both technical communities.
Connotations
Purely technical, with no cultural or connotative differences.
Frequency
Extremely rare outside specific scientific fields in both varieties. Frequency is equivalent.
Vocabulary
Collocations
Grammar
Valency Patterns
The degranulation of [CELL TYPE] was observed.[STIMULUS] induced degranulation.To inhibit/trigger/prevent degranulation.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used exclusively in life sciences, medical, and immunology research papers and textbooks.
Everyday
Virtually never used.
Technical
Core term in immunology, allergology, and cell biology to describe a key effector mechanism.
Examples
By Part of Speech
verb
British English
- The mast cells began to degranulate upon exposure to the allergen.
- Researchers measured how quickly the basophils degranulated.
American English
- The treatment prevented the neutrophils from degranulating.
- Once activated, the cells degranulate rapidly.
adjective
British English
- The degranulation response was measured in vitro.
- They observed a degranulation phenotype in the mutant cells.
American English
- The assay detects degranulation activity.
- A key degranulation inhibitor was identified.
Examples
By CEFR Level
- In an allergic reaction, mast cell degranulation releases histamine.
- Scientists can trigger degranulation in the laboratory to study immune responses.
- The novel compound effectively inhibited IgE-mediated mast cell degranulation without affecting cell viability.
- Quantitative analysis of the degranulation process revealed a previously uncharacterized biphasic release of cytokines.
Learning
Memory Aids
Mnemonic
Think: DE (release) + GRANULE (small particle) + ATION (process) = the process of releasing small particles from a cell.
Conceptual Metaphor
A 'sprinkler system' being activated inside a cell, spraying its contents outwards.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calques like *'дегрануляция'* in non-technical contexts as it will not be understood.
- Do not confuse with 'деградация' (degradation), which is a different concept.
Common Mistakes
- Pronouncing it as 'de-gran-u-la-tion' with a hard 'u' (/juː/). The 'u' is typically reduced (/jə/ or /jʊ/).
- Using it as a verb (e.g., 'the cell degranulates' is correct; 'degranulationing' is not).
Practice
Quiz
In which field is the term 'degranulation' primarily used?
FAQ
Frequently Asked Questions
No, it is a highly technical term used almost exclusively in biology and medicine.
The verb form is 'degranulate'. 'Degranulation' itself is a noun describing the process.
The release of inflammatory or toxic chemical mediators (like histamine) from cellular granules, which drives immune and allergic responses.
Degranulation is a specific type of exocytosis. All degranulation involves exocytosis, but not all exocytosis is degranulation (which specifically refers to the release of granules from certain immune cells).