isoline
C2Technical/Scientific
Definition
Meaning
A line on a map, chart, or diagram connecting points of equal value of a given quantity.
In various scientific disciplines, a curve connecting points of identical value for a specific measured parameter, such as temperature, pressure, or elevation.
Linguistics
Semantic Notes
An umbrella term; specific types have precise names (e.g., isobar, isotherm, contour line).
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Spelling and pronunciation are identical.
Connotations
Purely technical, devoid of cultural or evaluative connotations.
Frequency
Used with similar low frequency in both varieties, almost exclusively in academic, meteorological, or cartographic contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
The isoline [verb: shows/indicates/connects] [points/value].[A/an] [parameter] isoline [is/was] [drawn/plotted].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “No common idioms.”
Usage
Context Usage
Business
Virtually never used.
Academic
Common in geography, meteorology, geology, and physics textbooks and research papers.
Everyday
Extremely rare; would not be understood by the general public without explanation.
Technical
Standard term in cartography, climatology, and field analysis for visualising scalar fields.
Examples
By Part of Speech
verb
British English
- No verb form.
American English
- No verb form.
adverb
British English
- No adverbial form.
American English
- No adverbial form.
adjective
British English
- No adjectival form.
American English
- No adjectival form.
Examples
By CEFR Level
- This map has many lines. They show the same rain.
- On the weather map, the red isoline connects all points with the same temperature.
- The geologist drew an isoline on the map to indicate areas of equal magnetic intensity.
- By analysing the spacing of the pressure isolines, meteorologists can infer wind speed gradients within the system.
Learning
Memory Aids
Mnemonic
Think: 'ISO' means 'equal' (like in 'isosceles' triangle) + 'LINE'. So, it's a line connecting points of equal value.
Conceptual Metaphor
CONNECTEDNESS IS A LINE; EQUALITY IS CONNECTION.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Не путать с 'изоляцией' (isolation).
- Прямой перевод — 'изолиния'.
- Конкретные типы изолиний часто имеют более узкие, специальные названия (изобара, изотерма).
Common Mistakes
- Pronouncing it as 'is-o-line' with a short 'i' (should be 'eye-so-line').
- Using it in general conversation where simpler terms like 'line' or 'boundary' would suffice.
- Confusing it with a specific type (e.g., saying 'isoline' when you mean 'contour line' for elevation).
Practice
Quiz
What is the most precise synonym for 'isoline' in a geographical context?
FAQ
Frequently Asked Questions
It comes from the Greek 'isos', meaning 'equal'.
A contour line is a specific type of isoline used for elevation. All contour lines are isolines, but not all isolines are contour lines (e.g., isobars, isotherms).
Primarily by cartographers, meteorologists, climatologists, geologists, and physicists.
No, 'isoline' is strictly a noun. The related action would be 'to draw' or 'to plot' isolines.