svedberg
Very Rare / TechnicalHighly Technical / Scientific
Definition
Meaning
A unit for measuring sedimentation rate, especially of macromolecules and particles in ultracentrifugation, equal to 10^-13 seconds. Named after the Swedish chemist Theodor Svedberg.
Used in biochemistry and molecular biology to describe the sedimentation coefficient of particles, such as ribosomes or protein complexes, providing information about their size and density.
Linguistics
Semantic Notes
Almost exclusively used in specialized scientific contexts related to centrifugation and macromolecular analysis. It is a proper noun turned unit of measurement.
Dialectal Variation
British vs American Usage
Differences
No notable differences in usage; it is an international scientific term.
Connotations
No connotations; purely technical.
Frequency
Equally rare and specialized in both dialects.
Vocabulary
Collocations
Grammar
Valency Patterns
The [PARTICLE] has a sedimentation coefficient of [NUMBER] svedbergs.It was measured at [NUMBER] S.Vocabulary
Synonyms
Strong
Neutral
Usage
Context Usage
Business
Not used.
Academic
Used in biochemistry, molecular biology, and biophysics research papers and textbooks.
Everyday
Never used.
Technical
Core term in analytical ultracentrifugation for characterising macromolecules.
Examples
By CEFR Level
- The scientist referred to a '70S ribosome', where the 'S' stands for svedberg.
- The large ribosomal subunit sedimented at approximately 50 svedbergs, indicating its complex quaternary structure.
Learning
Memory Aids
Mnemonic
Think of 'Svedberg' as 'Swed(e)-berg' – a Swedish mountain (berg) for particles to 'sediment' down in a centrifuge.
Conceptual Metaphor
N/A - It is a precise unit of measurement.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- May be transliterated directly as 'сведберг'. No false friends.
Common Mistakes
- Misspelling as 'svedburg' or 'swedberg'.
- Confusing it with a general term for speed or size.
Practice
Quiz
What does the 'S' in '16S rRNA' stand for?
FAQ
Frequently Asked Questions
No, it is a highly specialized scientific term used almost exclusively in biochemistry and molecular biology.
It is pronounced /ˈsvɛdbərɡ/, with the stress on the first syllable.
Yes, the standard plural is 'svedbergs' (e.g., 'The subunits are 30 and 50 svedbergs').
You would only encounter it in advanced scientific literature discussing ultracentrifugation, ribosomes, or other macromolecular complexes.