celloidin: meaning, definition, pronunciation and examples
C2 / Extremely Rare / Technical JargonExclusively technical/scientific (histology, pathology, microscopy).
Quick answer
What does “celloidin” mean?
A tough, flexible substance derived from pyroxylin (a form of nitrocellulose) used in microscopy for embedding tissue specimens to support them during thin sectioning.
Audio
Pronunciation
Definition
Meaning and Definition
A tough, flexible substance derived from pyroxylin (a form of nitrocellulose) used in microscopy for embedding tissue specimens to support them during thin sectioning.
Primarily a technical histology term. In a broader sense, can refer to any similar embedding medium used in biological specimen preparation.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. The term is identically technical in both varieties.
Connotations
Neutral, purely denotative technical term.
Frequency
Equally rare and specialized in both BrE and AmE. Known only within specific scientific fields.
Grammar
How to Use “celloidin” in a Sentence
The tissue was embedded in celloidin.Researchers prepared celloidin sections of the brain.The specimen required celloidin infiltration.Vocabulary
Collocations
Examples
Examples of “celloidin” in a Sentence
noun
British English
- The classic technique involves dehydrating the specimen prior to celloidin embedding.
- These delicate celloidin sections are prone to wrinkling.
American English
- The lab switched to paraffin because celloidin processing is more time-consuming.
- He trimmed the celloidin block carefully before mounting it on the microtome.
Usage
Meaning in Context
Business
Never used.
Academic
Exclusively used in advanced biological/medical science papers, specifically in materials and methods sections detailing histological techniques.
Everyday
Never used.
Technical
Core term in histology laboratories and microscopy manuals. Used in protocols for specimen processing.
Vocabulary
Synonyms of “celloidin”
Strong
Neutral
Weak
Vocabulary
Antonyms of “celloidin”
Watch out
Common Mistakes When Using “celloidin”
- Confusing spelling: 'celloidine', 'celoidin'.
- Mispronunciation: stressing the first syllable (/ˈsɛlədɪn/).
- Using it as a general term for plastic, rather than a specific histological reagent.
FAQ
Frequently Asked Questions
No. Both are embedding media used in histology, but they are chemically different. Celloidin is nitrocellulose-based, tougher, and better for hard or uneven tissues. Paraffin wax is more common, cheaper, and allows for thinner sections but offers less support.
Almost never. Electron microscopy requires embedding in very hard resins (like epoxy or acrylic) to withstand the vacuum and produce ultra-thin sections. Celloidin is too soft and is used almost exclusively for light microscopy.
Its main advantage is minimal tissue shrinkage and excellent support for large, hard, or delicate specimens (e.g., whole organs, eyes, bones with marrow) that might crumble if embedded in harder media like paraffin.
The process is very slow (infiltration and hardening can take weeks), it uses flammable and hazardous solvents (ether, alcohol), and modern paraffin processing with improved equipment and techniques can often achieve adequate results more quickly and safely.
A tough, flexible substance derived from pyroxylin (a form of nitrocellulose) used in microscopy for embedding tissue specimens to support them during thin sectioning.
Celloidin is usually exclusively technical/scientific (histology, pathology, microscopy). in register.
Celloidin: in British English it is pronounced /sɛˈlɔɪdɪn/, and in American English it is pronounced /səˈlɔɪdən/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'CELL' (as in biological cell) + 'OID' (resembling) + 'IN' (a substance you put something *in* to embed it). A substance you put cells *in* that resembles a solid matrix.
Conceptual Metaphor
CELLOIDIN IS A SUPPORTIVE MATRIX / SCAFFOLDING. (It provides the structural framework that holds delicate tissue firm for cutting.)
Practice
Quiz
In which field would you most likely encounter the term 'celloidin'?