allotrope: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “allotrope” mean?
A structurally distinct form of a pure chemical element, where atoms are bonded together in a different manner.
Audio
Pronunciation
Definition
Meaning and Definition
A structurally distinct form of a pure chemical element, where atoms are bonded together in a different manner.
Any distinct physical manifestation or form of a substance, sometimes metaphorically extended to describe different modes or expressions of a single core concept.
Dialectal Variation
British vs American Usage
Differences
Usage is identical in both varieties. The term is technical and not subject to regional variation in meaning.
Connotations
Neutral, purely scientific.
Frequency
Equally low-frequency in both dialects, confined to scientific contexts.
Grammar
How to Use “allotrope” in a Sentence
[element] has [number] allotropes[allotrope] is a form of [element][allotrope] is more [adjective] than [other allotrope]Vocabulary
Collocations
Examples
Examples of “allotrope” in a Sentence
noun
British English
- The newly synthesised carbon allotrope exhibited remarkable conductivity.
- Ozone is a less stable allotrope of oxygen.
- They are researching the properties of a novel boron allotrope.
American English
- The newly synthesized carbon allotrope exhibited remarkable conductivity.
- Phosphorus has several allotropes, including white and red.
- The team characterized the metallic allotrope of the element.
adverb
British English
- The atoms rearrange allotropically under high pressure.
American English
- The atoms rearrange allotropically under high pressure.
adjective
British English
- The allotropic behaviour of tin is responsible for 'tin pest'.
- Allotropic transformation occurs at specific temperatures.
American English
- Allotropic behavior of tin is responsible for 'tin pest'.
- The element's allotropic forms have distinct properties.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Common in chemistry, physics, and materials science papers. Occasionally used metaphorically in humanities (e.g., 'an allotrope of the original ideology').
Everyday
Extremely rare. Would only be used by someone explaining a scientific concept.
Technical
Core term in chemistry for discussing elements like carbon, oxygen, sulfur, phosphorus, and tin.
Vocabulary
Synonyms of “allotrope”
Strong
Neutral
Weak
Vocabulary
Antonyms of “allotrope”
Watch out
Common Mistakes When Using “allotrope”
- Using 'allotrope' for compounds or mixtures (it applies only to pure elements).
- Confusing with 'isomer' (which applies to molecules with the same atoms but different arrangements).
- Misspelling as 'allotrap' or 'allotrophy'.
- Incorrect plural: 'allotropes' (correct), not 'allotropees'.
FAQ
Frequently Asked Questions
Allotropes are different structural forms of the same element (same number of protons/electrons, different atomic arrangement). Isotopes are atoms of the same element with different numbers of neutrons (same chemistry, different nuclear mass).
No, strictly speaking, allotropes refer only to pure chemical elements. For compounds, the term 'polymorph' is used in a similar way to describe different crystalline structures.
No, it is a specialised scientific (C2-level) term. It is common in chemistry textbooks and research but very rare in everyday conversation.
Carbon is the most famous example, with well-known allotropes including graphite (soft, conductive), diamond (hard, insulating), and graphene (a single atom-thick sheet).
A structurally distinct form of a pure chemical element, where atoms are bonded together in a different manner.
Allotrope is usually technical/scientific in register.
Allotrope: in British English it is pronounced /ˈæl.ə.trəʊp/, and in American English it is pronounced /ˈæl.ə.troʊp/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: ALL the ELEMENTS can have different ROPES (shapes/forms) – ALLOTROPE.
Conceptual Metaphor
DIFFERENT FACES OF THE SAME ENTITY; MULTIPLE PERSONALITIES OF AN ELEMENT.
Practice
Quiz
Which of the following best describes an 'allotrope'?