waals
C2Technical/Scientific
Definition
Meaning
A plural noun referring to the forces of attraction between molecules or atoms, named after the Dutch physicist Johannes Diderik van der Waals.
In common usage, it is almost exclusively used in the fixed scientific term 'van der Waals forces'. It is not used independently as a countable noun in general English.
Linguistics
Semantic Notes
The term is a proper noun (a surname) used attributively. It is not a common English word and has no meaning outside its specific scientific context. It is always preceded by 'van der'.
Dialectal Variation
British vs American Usage
Differences
No significant differences in usage, spelling, or pronunciation between British and American English in this highly technical term.
Connotations
Purely scientific, with no regional connotations.
Frequency
Extremely low frequency in general language, but standard within physics and chemistry discourse in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
[van der Waals] + NOUN (forces, interactions, radius)ADJECTIVE (weak, strong) + [van der Waals forces]Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used in physics, chemistry, materials science, and biology papers to describe weak, non-covalent interactions between molecules.
Everyday
Virtually never used.
Technical
Core term in physical chemistry and molecular physics.
Examples
By Part of Speech
adjective
British English
- The gecko's grip relies on van der Waals interactions with the surface.
American English
- Researchers measured the van der Waals radius of the noble gas atom.
Examples
By CEFR Level
- Geckos can climb walls due to van der Waals forces on their feet.
- These molecules are held together by weak van der Waals forces.
- The van der Waals equation provides a correction to the ideal gas law for real gas behaviour.
- The stability of the protein's tertiary structure is partly due to numerous van der Waals interactions.
Learning
Memory Aids
Mnemonic
Think of a WALL made by VAN DER (a person) that is very weak and only holds things together loosely, like weak intermolecular forces.
Conceptual Metaphor
A weak, temporary glue or a faint magnetic attraction.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'waals' as 'walls' (стены). It is an untranslated proper name.
- The term is used as a fixed unit 'van der Waals' (ван-дер-Ваальс).
Common Mistakes
- Using 'Waals' as a standalone noun (e.g., 'The waals are strong.').
- Misspelling as 'Walls', 'Vanderwalls', or 'Van der Walls'.
- Incorrectly capitalising as 'Van Der Waals' in the middle of the term.
Practice
Quiz
What does the term 'van der Waals' specifically refer to?
FAQ
Frequently Asked Questions
No. 'Waals' only has meaning as part of the fixed term 'van der Waals', derived from a surname. It is not an independent English word.
No, it is not hyphenated. The standard spelling is 'van der Waals forces'.
It is a core concept in physical chemistry, molecular physics, biophysics, and materials science.
In British English: /væn də ˈwɑːlz/. In American English: /væn dər ˈwɑːlz/. The 'van' rhymes with 'can', and 'Waals' sounds like 'walls'.