liquidus: meaning, definition, pronunciation and examples
Low (C2)Formal, Technical
Quick answer
What does “liquidus” mean?
In chemistry and materials science, the temperature above which a substance is completely liquid at a given pressure.
Audio
Pronunciation
Definition
Meaning and Definition
In chemistry and materials science, the temperature above which a substance is completely liquid at a given pressure.
A line on a phase diagram representing this temperature boundary for different compositions, or an adjective describing a state of complete liquidity.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling follows regional conventions within technical texts (e.g., 'behaviour' vs. 'behavior').
Connotations
Purely technical and neutral in both dialects.
Frequency
Equally rare and specialised in both regions.
Grammar
How to Use “liquidus” in a Sentence
The liquidus of [SUBSTANCE/ALLOY] is...[SUBSTANCE/ALLOY] is heated above its liquidus.The liquidus defines the boundary between...A plot of the liquidus for the system.Vocabulary
Collocations
Examples
Examples of “liquidus” in a Sentence
adjective
British English
- The alloy must be held at a liquidus state before casting.
American English
- For this composition, the liquidus condition is reached at 1200°C.
Usage
Meaning in Context
Business
Rarely used, except potentially in R&D reports for materials or chemical companies.
Academic
Common in advanced textbooks, theses, and papers in materials science, geology, and physical chemistry.
Everyday
Virtually never used.
Technical
The primary domain of use. Essential for describing phase equilibria, alloy design, casting processes, and igneous petrology.
Vocabulary
Synonyms of “liquidus”
Strong
Neutral
Weak
Vocabulary
Antonyms of “liquidus”
Watch out
Common Mistakes When Using “liquidus”
- Using 'liquidus' as a general adjective (e.g., 'a liquidus metal').
- Confusing 'liquidus' (complete melt) with 'solidus' (complete solid).
- Misspelling as 'liquidas' or 'liquidous'.
FAQ
Frequently Asked Questions
Not exactly. The melting point refers to a pure substance. The liquidus is the equivalent concept for a mixture, alloy, or solution; it's the temperature above which a specific composition is completely liquid.
The direct antonym is 'solidus'. The solidus line on a phase diagram represents the temperature below which the material is completely solid.
It is critical in metallurgy and materials engineering for designing alloys and controlling processes like casting, welding, and heat treatment. Knowing the liquidus temperature ensures materials are processed correctly to achieve desired properties.
No, it is a highly specialised scientific term. Using it in general conversation would be confusing and inappropriate.
In chemistry and materials science, the temperature above which a substance is completely liquid at a given pressure.
Liquidus is usually formal, technical in register.
Liquidus: in British English it is pronounced /ˈlɪk.wɪ.dəs/, and in American English it is pronounced /ˈlɪk.wɪ.dəs/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think 'LIQUID-US' - when it's US (all of it) that's liquid, you've reached the LIQUIDUS temperature.
Conceptual Metaphor
A THRESHOLD or BOUNDARY (between solid+liquid and pure liquid states).
Practice
Quiz
What does the 'liquidus' specifically represent in a binary phase diagram?