cuvette
C2 / Specialized / TechnicalFormal / Technical / Scientific
Definition
Meaning
A small, transparent vessel or container, typically tube-shaped, used in laboratories to hold samples for analysis.
In broader scientific or technical contexts, any shallow, rectangular or cylindrical container used to hold liquids for measurement or analysis. In French, it can also refer to a small basin or a shallow ditch.
Linguistics
Semantic Notes
Primarily a technical term in chemistry, biology, and environmental science. Not used in everyday conversation. The core concept is a standardized container for optical analysis.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage between UK and US English. The term is international scientific vocabulary.
Connotations
Purely technical and neutral. Associated with precision, calibration, and laboratory procedures.
Frequency
Equally low-frequency in both dialects, confined to scientific literature and laboratory settings.
Vocabulary
Collocations
Grammar
Valency Patterns
[verb] + the cuvette + [with sample][measurement] + [prep] + a cuvette[adjective] + cuvette + [for purpose]Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Virtually never used.
Academic
Used in research papers, lab manuals, and science textbooks, specifically in chemistry, biochemistry, and physics where spectrophotometry is performed.
Everyday
Never used.
Technical
The primary domain. Refers to the specific piece of lab equipment used in colorimeters, spectrophotometers, and fluorometers.
Examples
By Part of Speech
noun
British English
- The technician carefully handled the fragile quartz cuvette.
- Ensure the cuvette is properly aligned in the spectrophotometer.
- We need to order more disposable cuvettes for the teaching lab.
American English
- The protocol calls for a 1 cm path length cuvette.
- After use, rinse the cuvette thoroughly with deionized water.
- Fingerprints on the cuvette will skew the absorbance reading.
Examples
By CEFR Level
- The scientist placed the liquid sample into a clear plastic cuvette.
- The lab manual warned against using scratched cuvettes.
- The absorbance was measured using a matched set of quartz cuvettes to minimise instrumental error.
- Prior to analysis, the cuvettes were meticulously cleaned with a series of solvents to remove any residual contaminants.
Learning
Memory Aids
Mnemonic
Think: 'You 'view' (vue) a sample 'in' (ette) a CUVETTE.' It's a small thing you view liquid in.
Conceptual Metaphor
A WINDOW FOR LIGHT: The cuvette is conceived as a transparent portal that allows light to pass through a sample for measurement.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- False friend with 'ковш' (kovsh - ladle/bucket). A cuvette is for measurement, not for scooping.
- Direct borrowing as 'кювета' (kyuveta) exists in Russian but is more specific to laboratory context.
Common Mistakes
- Misspelling as 'cuvet', 'cuvetee', or 'cuvete'.
- Using it as a general term for any small bottle or tube.
- Incorrect plural: 'cuvettes' is standard, but non-native speakers might hesitate.
Practice
Quiz
What is the primary function of a cuvette?
FAQ
Frequently Asked Questions
No. While both hold liquids, a cuvette has precisely parallel, optical-grade transparent sides (often two opposite sides) for accurate light transmission in instruments. A test tube is for general holding, mixing, or heating.
Common materials are optical glass (for visible light), quartz or fused silica (for UV light), and plastic (for disposable, low-cost applications in visible range).
Glass and quartz cuvettes are designed to be cleaned and reused. Plastic cuvettes are often disposable. Reusability depends on the material, cost, and risk of sample cross-contamination.
Path length is the internal distance (usually 1 cm) the light travels through the sample inside the cuvette. It is a critical factor in calculating concentration using the Beer-Lambert law in spectrophotometry.