molybdenum disulfide: meaning, definition, pronunciation and examples
Rare (Technical/Scientific)Technical/Scientific
Quick answer
What does “molybdenum disulfide” mean?
A compound of molybdenum and sulfur (MoS₂), typically used as a dry lubricant and in electronics.
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Pronunciation
Definition
Meaning and Definition
A compound of molybdenum and sulfur (MoS₂), typically used as a dry lubricant and in electronics.
A grey-black, crystalline solid with a layered structure that allows sheets to slide over each other, giving it lubricating properties. Also used as a catalyst in petroleum refining and as a semiconductor in some electronic applications.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling of 'sulfide' is 'sulphide' in older British texts, though 'sulfide' is increasingly common in scientific literature. The word 'molybdenum' is identical.
Connotations
Neutral technical term in both regions. Carries connotations of industry, engineering, and high-tech applications.
Frequency
Extremely low frequency in general discourse, appearing almost exclusively in engineering, chemistry, geology, and industrial contexts.
Grammar
How to Use “molybdenum disulfide” in a Sentence
[Subject] is coated with molybdenum disulfide.[Subject] uses molybdenum disulfide as a lubricant.The [component] contains molybdenum disulfide.Vocabulary
Collocations
Examples
Examples of “molybdenum disulfide” in a Sentence
noun
British English
- The mechanic recommended a grease fortified with molybdenum disulfide for the CV joints.
- Molybdenite is the principal ore from which molybdenum disulfide is derived.
American English
- This high-performance dry lubricant spray contains molybdenum disulfide.
- Researchers are studying the superconducting properties of monolayer molybdenum disulfide.
Usage
Meaning in Context
Business
Used in procurement, specifications, and industrial supply contexts (e.g., 'The contract includes delivery of molybdenum disulfide grease').
Academic
Frequent in materials science, tribology, and inorganic chemistry papers (e.g., 'The friction coefficient was reduced by applying a thin film of molybdenum disulfide').
Everyday
Virtually never used. Might be encountered by mechanics or DIY enthusiasts using specialized lubricants.
Technical
Core term in engineering, lubrication technology, and semiconductor research (e.g., 'Few-layer molybdenum disulfide exhibits promising optoelectronic properties').
Vocabulary
Synonyms of “molybdenum disulfide”
Strong
Neutral
Weak
Vocabulary
Antonyms of “molybdenum disulfide”
Watch out
Common Mistakes When Using “molybdenum disulfide”
- Mispronouncing 'molybdenum' (e.g., /moʊˈlɪbdənəm/).
- Confusing it with 'manganese' or 'magnesium'.
- Misspelling 'disulfide' as 'disulphide' inconsistently in formal writing.
FAQ
Frequently Asked Questions
No, they are different materials. Both have layered structures and lubricating properties, but graphite is carbon (C), while molybdenum disulfide is a compound of molybdenum and sulfur (MoS₂). MoS₂ generally performs better in high-vacuum and high-load conditions.
Typically, no. It is an industrial chemical not approved for direct food contact in most jurisdictions. Food-grade lubricants use other, approved substances.
Its crystalline structure consists of sheets of molybdenum atoms sandwiched between layers of sulfur atoms. These layers are held together by weak forces, allowing them to slide over each other easily, which reduces friction between surfaces.
Bulk molybdenum disulfide is a semiconductor. Its electrical properties change dramatically when it is thinned to a single atomic layer (2D material), where it becomes a direct bandgap semiconductor, interesting for electronics and optoelectronics.
A compound of molybdenum and sulfur (MoS₂), typically used as a dry lubricant and in electronics.
Molybdenum disulfide is usually technical/scientific in register.
Molybdenum disulfide: in British English it is pronounced /məˌlɪbdɪnəm daɪˈsʌlfaɪd/, and in American English it is pronounced /məˌlɪbdənəm daɪˈsʌlˌfaɪd/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. The term is purely technical.”
Learning
Memory Aids
Mnemonic
Think: 'MOLY makes metal slide easily' – MOLYbdenum diSULFide is a SLIDing agent.
Conceptual Metaphor
Layered like graphite: Conceptualised as a stack of sheets that shear easily, reducing friction.
Practice
Quiz
What is the primary commercial use of molybdenum disulfide (MoS₂)?