hemicellulose: meaning, definition, pronunciation and examples
C2Technical / Academic
Quick answer
What does “hemicellulose” mean?
A polysaccharide component of plant cell walls, less complex than cellulose.
Audio
Pronunciation
Definition
Meaning and Definition
A polysaccharide component of plant cell walls, less complex than cellulose.
A group of heterogeneous polysaccharides (such as xylans, mannans, and glucans) that, along with cellulose and lignin, form the structural matrix of plant cell walls. They are more soluble and easier to hydrolyze than cellulose.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or usage differences. Both varieties use the term identically in technical contexts.
Connotations
None beyond its scientific denotation.
Frequency
Exclusively used in specialised fields (e.g., botany, biochemistry, biofuel research, paper industry) in both varieties, with no discernible frequency difference.
Grammar
How to Use “hemicellulose” in a Sentence
The [biomass/plant material] contains hemicellulose.Hemicellulose is hydrolysed to produce [xylose/fermentable sugars].Enzymes degrade the hemicellulose.Vocabulary
Collocations
Examples
Examples of “hemicellulose” in a Sentence
verb
British English
- The pretreatment process is designed to hemicellulolyse the biomass.
- Engineered microbes can metabolise hemicellulose-derived sugars.
American English
- The pretreatment process is designed to hemicellulyze the biomass.
- Engineered microbes can metabolize hemicellulose-derived sugars.
adjective
British English
- The hemicellulosic fraction was analysed separately.
- They studied hemicellulose degradation pathways.
American English
- The hemicellulosic fraction was analyzed separately.
- They studied hemicellulose degradation pathways.
Usage
Meaning in Context
Business
Used in industries like biofuel production, paper manufacturing, and biorefining when discussing feedstock composition and process efficiency.
Academic
Common in research papers on plant physiology, carbohydrate chemistry, renewable energy, and material science.
Everyday
Virtually never used.
Technical
Core term in fields of biochemistry, botany, agricultural science, and chemical engineering.
Vocabulary
Synonyms of “hemicellulose”
Neutral
Weak
Vocabulary
Antonyms of “hemicellulose”
Watch out
Common Mistakes When Using “hemicellulose”
- Misspelling as 'hemicellulous' or 'hemicellulase' (the latter is an enzyme).
- Using it as a countable noun (e.g., 'a hemicellulose') when it is usually non-count, referring to a class of compounds.
FAQ
Frequently Asked Questions
No. They are both polysaccharides in plant cell walls, but cellulose is a linear, crystalline polymer of glucose, while hemicellulose is a branched, amorphous polymer of various sugars (like xylose, mannose).
Humans lack the enzymes to digest hemicellulose, so it contributes to dietary fibre and passes through the digestive system. However, some gut microbes can ferment it.
Hemicellulose is a major source of pentose sugars (like xylose) which can be fermented by microorganisms to produce biofuels like ethanol, making the overall biomass conversion more efficient.
It comes from Greek, meaning 'half'. In 'hemicellulose', it implies a substance that is related to or partly like cellulose, but chemically and structurally distinct.
A polysaccharide component of plant cell walls, less complex than cellulose.
Hemicellulose is usually technical / academic in register.
Hemicellulose: in British English it is pronounced /ˌhemɪˈseljʊləʊs/, and in American English it is pronounced /ˌhemɪˈseljəloʊs/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think 'HALF-cellulose' ('hemi-' means half). It's a related, but less rigid, partner to cellulose in the plant cell wall.
Conceptual Metaphor
The 'glue' or 'matrix' that binds cellulose fibres together in the plant's structural framework.
Practice
Quiz
What is the primary role of hemicellulose in plant cell walls?