biuret: meaning, definition, pronunciation and examples
Very lowTechnical / Scientific
Quick answer
What does “biuret” mean?
A chemical compound formed by condensation of two molecules of urea.
Audio
Pronunciation
Definition
Meaning and Definition
A chemical compound formed by condensation of two molecules of urea.
Refers specifically to the compound H₂NCONHCONH₂, or more broadly to compounds containing the biuret group (-NHCONHCONH-). It is also used to describe the characteristic color reaction (violet) with copper ions in alkaline solution (the biuret test).
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling and pronunciation are consistent.
Connotations
None beyond its technical scientific meaning.
Frequency
Equally rare and specialised in both varieties, confined to scientific literature and education.
Grammar
How to Use “biuret” in a Sentence
The [sample/material] showed a positive biuret reaction.The [test/assay] was performed using the biuret method.Vocabulary
Collocations
Examples
Examples of “biuret” in a Sentence
adjective
British English
- The biuret assay is common in undergraduate labs.
- A biuret-positive sample indicates peptide bonds.
American English
- We ran a biuret-based protein analysis.
- The solution gave a biuret-like colour change.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in chemistry and biochemistry textbooks, research papers, and lab protocols.
Everyday
Not used.
Technical
Core term in analytical chemistry and protein biochemistry for a specific test.
Vocabulary
Synonyms of “biuret”
Neutral
Weak
Watch out
Common Mistakes When Using “biuret”
- Misspelling as 'buret' (which is a chemistry lab tube) or 'biuret' with one 'r'.
- Using it as a general term for protein, rather than specifically for the test or compound.
FAQ
Frequently Asked Questions
No. Biuret is a specific compound, but the 'biuret test' is a chemical assay used to detect the presence of proteins (specifically peptide bonds).
It is highly unlikely and would not be understood outside a scientific context. It is a specialised technical term.
The classic biuret reagent is an alkaline solution of copper(II) sulphate. The violet colour arises from a complex formed with peptide bonds.
In standard usage, it is not a proper noun and is written in lowercase unless starting a sentence. Capitalisation is not significant for its meaning.
A chemical compound formed by condensation of two molecules of urea.
Biuret is usually technical / scientific in register.
Biuret: in British English it is pronounced /ˈbʌɪjʊrɛt/, and in American English it is pronounced /ˈbaɪjəˌrɛt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'BI-' (two) + 'URET' (from urea) = a compound made from two urea molecules.
Conceptual Metaphor
A diagnostic key: The 'biuret test' acts as a key to unlock the presence of proteins.
Practice
Quiz
What is the primary context for encountering the word 'biuret'?