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
by protraction
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "by protraction" is correct and can be used in written English.
It is typically used in contexts involving the extension or prolongation of time or space, often in technical or formal writing. Example: "The project was completed by protraction of the deadline, allowing for additional research and development."
✓ Grammatically correct
Science
News & Media
Encyclopedias
Alternative expressions(3)
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
4 human-written examples
We demonstrated that the potential for treatment benefits in performing RPE adjunctive to maxillary expansion definitely exists because the mechanical environment generated by protraction alone can disrupt or inhibit the normal growth of the midpalatal suture.
Science
However, in regard to treatment mechanics in the extraction cases and according to patients' charts, after crowding was addressed by the retraction of the anterior teeth, the implemented biomechanics aimed at closure of the remaining spaces by protraction of the posterior teeth.
Science
Head yaw can be achieved by protraction of one occipital process and retraction of the other.
Science
In contrast, the progression-free survival rate in Group B was lower than that in Group A. This might have been caused by protraction of RT.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
It is uncertain why the upper airway space increased by maxillary protraction.
This was similar to those reported by the protraction facemask studies [10, 18, 25, 26].
Science
A comparison of gene expression changes by dose rate between LDR and acute only, revealed the lowered expression of genes encoding glycolytic enzymes, by the protraction of exposure at 24 h.
Science
By convention, protraction means anterior rotation of the lateral border of the scapula; lateral rotation means lateral rotation of the inferior angle; backward tilt means that the scapula rotates in such a way that the cranial border of the scapula moves dorsally (Wu et al. 2005).
Science
This study was designed to evaluate patterns of stress generation in the temporomandibular joint after mandibular protraction, by using a 3-dimensional finite element method.
Although several projects have examined the maxillary protraction by computation methods such as finite element analysis (FEA) [13 18], the specific mechanical benefit of maxillary expansion on the suture has not been demonstrated and questions remain on its necessity.
Science
This type of injury is exacerbated by simultaneous scapular protraction and infraspinatus contraction [ 6].
Expert writing Tips
Best practice
When using "by protraction", ensure the context clearly indicates that something is being extended in time or space. It is commonly found in scientific or technical writing, so maintain a formal tone.
Common error
Avoid using "by protraction" in casual conversation. The phrase is typically reserved for technical or formal contexts, and using it inappropriately can sound unnatural or pretentious.
Source & Trust
84%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "by protraction" functions as a prepositional phrase modifying a verb or noun. According to Ludwig, it indicates the means or method by which something is extended in time or space, often in a technical or formal context.
Frequent in
Science
70%
News & Media
15%
Encyclopedias
15%
Less common in
Formal & Business
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "by protraction" is grammatically correct and functions as a prepositional phrase, primarily used in formal and scientific contexts to describe the means by which something is extended in time or space. Ludwig AI confirms its appropriateness in technical writing, although it is less common in everyday language. When considering alternative phrases, options like "through prolongation" or "via extension" may be suitable depending on the specific nuance you wish to convey. Remember to reserve "by protraction" for formal settings to maintain clarity and precision.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
through prolongation
Emphasizes extending the duration of something as the means.
via extension
Highlights the act of extending as the method.
by means of lengthening
More explicitly states the act of making something longer.
through elongation
Focuses on making something longer in a more physical sense.
by drawing out
Implies a more active or intentional prolongation.
through increased duration
Specifies that the time span is what's being extended.
by stretching
Suggests a forced or unnatural extension.
via augmented length
Implies increasing the physical dimension.
by widening
Focuses on expanding the breadth rather than the length.
through expanded time
Specifically relates to increasing the amount of time available.
FAQs
How can I use "by protraction" in a sentence?
You can use "by protraction" to describe a process extended in time, as in: "The experiment's success was ensured "by protraction" of the observation period."
What's a simpler way to say "by protraction"?
Depending on the context, you can replace "by protraction" with phrases like "through prolongation" or "via extension".
Is "by protraction" formal language?
Yes, "by protraction" is considered formal and technical language, often used in scientific, medical, or legal contexts. It's less common in everyday conversation.
How does "by protraction" differ from "by prolongation"?
While similar, "by protraction" often implies a more deliberate or engineered extension, whereas "by prolongation" can simply mean something is extended in time without specific intent. The difference is subtle and context-dependent.
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
84%
Authority and reliability
4.1/5
Expert rating
Real-world application tested