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
as onset
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "as onset" is not correct and does not convey a clear meaning in written English.
It may be intended to refer to something related to the beginning or initiation of an event or process, but it lacks clarity and context. Example: "As onset of the project approached, the team prepared for the upcoming challenges."
⚠ May contain grammatical issues
Science
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
However, the mechanism of AS onset is still unclear, and effective therapies are urgently needed for this disease.
Premature menopause is defined as onset before 40, while early onset menopause occurs before 45.
News & Media
Later in adolescence, transitory amenorrhea may be associated with stress, such as onset of the school year or moving to a new home.
Encyclopedias
Finally, section three contained questions relating to hot aches such as onset, frequency, duration and associated symptoms.
Science
Peaks and valleys of the resulting signal of Equation (8) are, respectively, marked as onset and offset candidates.
Key parameters such as "onset" temperature, "onset" pressure, self-heat rate, and pressure rate are were studied.
Thermal margins such as Onset of Nucleate Boiling (ONB) temperature margin and Departure from Nucleate Boiling Ratio (DNBR) were estimated for reactor safety and design purposes.
Science
Preventing the ONB occurrence protects systems from unfavorable thermal hydraulic events, such as Onset of Flow Instability (OFI) and Critical Heat Flux (CHF).
Science
In this stage, at first, the peaks and valleys of derivative smoothed intensity of modulation spectrogram are detected and marked as onset and offset candidates.
Baseline characteristics, including age, gender, body weight, and Cause of septic shock, as well as onset time of septic shock, IGSII, and mortality were not different among groups.
Therefore, renin is a particularly promising target for blood pressure as well as onset and progression of cardiovascular and renal diseases.
Expert writing Tips
Best practice
While "as onset" is frequently used in scientific literature to denote the beginning of a process or condition, consider replacing it with clearer alternatives like "at the beginning of" or "with the onset of" for enhanced readability and grammatical accuracy.
Common error
Avoid using "as onset" as a direct replacement for prepositions like "at" or "with" when describing the start of something. Although common, it's grammatically unsound. Instead, rephrase using grammatically correct alternatives to ensure clarity and avoid confusing your reader.
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "as onset" functions as a temporal marker, frequently used in scientific and technical contexts to indicate the commencement or initiation of a process, event, or condition. Despite its prevalence, Ludwig AI indicates that it is grammatically incorrect.
Frequent in
Science
95%
News & Media
2%
Encyclopedias
1%
Less common in
Wiki
1%
Formal & Business
0%
Reference
0%
Ludwig's WRAP-UP
In summary, while the phrase "as onset" is frequently used, particularly in scientific contexts to denote the beginning of something, it is grammatically questionable. Ludwig AI highlights its incorrectness and suggests using alternatives like "at the beginning", "at the onset", or "with the onset" for improved clarity and grammatical accuracy. The phrase appears most often in scientific literature and less so in general news or business contexts. While prevalent, writers should consider grammatically sound alternatives to avoid potential confusion.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
at the beginning
Replaces "as onset" with a more standard and direct expression of starting point.
at the start
Similar to "at the beginning", this emphasizes the commencement of an event or process.
upon commencement
A more formal way of indicating the start, suitable for official or technical contexts.
with the initiation
Highlights the act of starting or initiating something, providing a slightly different emphasis.
after the initiation
Very similar to "with the initiation", this one explicitly marks a point in time.
following the outbreak
Specifically indicates the start related to something negative, implies a process.
once it began
Emphasizes the moment when something started, focusing on the beginning of an action or state.
since the appearance
Highlights the moment something becomes visible or noticeable, implying a newly emerged condition.
from the emergence
Suggests a gradual development or unfolding from a starting point.
when it arose
Implies something appearing or starting suddenly.
FAQs
What does "as onset" mean?
"As onset" generally refers to the beginning or start of something, such as a disease or a process. However, it's often used incorrectly and might be better phrased using alternatives.
How can I use "as onset" correctly in a sentence?
While commonly used, "as onset" is not grammatically correct. It's better to use phrases like "at the onset", "with the onset", or "at the beginning" for clarity and grammatical accuracy.
What can I say instead of "as onset"?
You can use alternatives like "at the beginning", "with the onset", or "at the start" depending on the context.
Is it grammatically correct to use "as onset"?
No, "as onset" is not considered grammatically correct in standard English. Using phrases like "at the onset" or "with the onset" is recommended for better grammar.
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
2.8/5
Expert rating
Real-world application tested