Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
Threshold line
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "Threshold line" is correct and usable in written English.
It can be used in contexts related to boundaries, limits, or points of transition, such as in discussions about data analysis, design, or physical spaces. Example: "The threshold line indicates the point at which the temperature exceeds the safe limit for the equipment."
✓ Grammatically correct
Science
News & Media
Formal & Business
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
(You can see the influence of vintage typography in the logos of many modern companies, including the one for Target's Threshold line of furniture and housewares, which Peters designed).
News & Media
This threshold line (negative power relation) is similar to the threshold line for shallow gully initiation.
Science
C t is the intersection between an amplification curve and a threshold line.
Without a template, no Cq could be determined since it never passed the threshold line.
Science
Furthermore, the topographical threshold line indicating the critical slope gradient for a given contributing drainage area was determined.
Science
The trend of acceleration values is very similar to previous results with over 70%% of recorded values above the comfort threshold line.
Science
Figure 5 shows that the threshold line S + 1.8 U = C r1 can separate slopes with shallow landslides from slopes without shallow landslides exactly.
Science
The point Γ 1 + : = ( v t h, g 0 − ) is on the threshold line, and there is a trajectory Γ1 that flows through this point.
The £20,000 threshold line has very few points below it, indicating that the probability of cost-effectiveness is likely to be very low at that willingness-to-pay threshold.
Science
The normalized fluorescence data were converted to a log scale and the threshold was determined to calculate the threshold cycle value (Ct; the cycle at which the threshold line crosses the amplification curve).
Science
Note that total number of the filters in the bank is 26, and the worst-case limits were not reached for the SNR levels used in the experiments, they rather adjust the slope of the threshold line.
Expert writing Tips
Best practice
When using "Threshold line" in technical writing, clearly define what the threshold represents within the specific context to avoid ambiguity. For example, specify if it's a value, time, or other measurable quantity.
Common error
Avoid using "Threshold line" when referring to a range of acceptable values. A threshold represents a specific point, whereas a range encompasses values between two limits.
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "Threshold line" functions primarily as a noun phrase. It typically describes a boundary or a limit, often in graphical or analytical contexts. Ludwig, as indicated, confirms its validity and applicability across different domains.
Frequent in
Science
75%
News & Media
15%
Formal & Business
10%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "Threshold line" is a grammatically correct and frequently used noun phrase that denotes a boundary or limit, particularly in scientific and technical fields. As confirmed by Ludwig, its primary function is to establish a reference point for comparison and decision-making. It maintains a formal and scientific register, and the usage examples highlight its prevalence in scientific research, news media, and formal business contexts. While "Threshold line" is suitable for formal communication, ensure it's well-defined within the specific context to prevent any ambiguity. Consider related phrases such as "boundary line", "limit line", or "critical limit" for subtle variations in meaning.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Boundary line
Emphasizes the concept of a dividing line or border.
Limit line
Focuses on the restrictive aspect of a threshold.
Critical limit
Highlights the importance or severity of the threshold.
Cutoff point
Suggests a specific value or level at which something changes.
Demarcation line
Indicates a clear separation or distinction.
Breaking point
Implies a point at which something fails or changes drastically.
Critical threshold
Highlights the criticality of the threshold point.
Marginal level
Refers to a level near the edge or limit of acceptability.
Acceptance limit
Specifies the maximum or minimum value that is considered acceptable.
Division line
Focuses on separation into discrete parts.
FAQs
How is "Threshold line" used in scientific contexts?
In scientific research, "Threshold line" often refers to a boundary on a graph or chart, indicating a critical value or point of change. For example, it can represent the point at which a reaction becomes significant or a disease is considered detectable.
What are some alternatives to "Threshold line" in data analysis?
In data analysis, alternatives to "Threshold line" include "cutoff point", "critical value", or "boundary line". The best choice depends on the specific context and the nature of the data.
Is "Threshold line" appropriate for formal business writing?
Yes, "Threshold line" is suitable for formal business writing when discussing limits or benchmarks. However, ensure the term is well-defined for your audience. Consider alternatives like "minimum requirement" or "target level" if they better convey the intended meaning.
How does a "Threshold line" differ from a trend line?
A "Threshold line" represents a fixed boundary or critical value, while a trend line illustrates the general direction of data points over time. A trend line shows movement, whereas a "Threshold line" serves as a static reference point.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested