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
spiral valve
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "spiral valve" is correct and usable in written English.
It can be used in contexts related to anatomy, biology, or engineering, particularly when discussing structures that have a spiral shape or function. Example: "The fish's digestive system features a spiral valve that increases the surface area for nutrient absorption."
✓ Grammatically correct
Science
Encyclopedias
News & Media
Wiki
Alternative expressions(1)
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
19 human-written examples
A spiral membranous fold (spiral valve) extends through the intestine of all sharks, rays, and chimaeras.
Encyclopedias
The larger its internal surface, the greater its absorptive efficiency, and a spiral valve is one method of increasing its absorption surface.
Encyclopedias
Sharks, rays, chimaeras, lungfishes, surviving chondrosteans, holosteans, and even a few of the more primitive teleosts have a spiral valve or at least traces of it in the intestine.
Encyclopedias
Although both groups have many characteristics in common (such as the possession of a cartilaginous skeleton, placoid scales, teeth simply embedded in gums, a spiral valve in the intestine, urea retention habitus, internal fertilization [for which the males have claspers], and the absence of a swim bladder), the two groups may have evolved independently along parallel lines.
Encyclopedias
Basal expression levels of the TLR2-TIR mRNA were found to be significantly higher in kidneys followed by fins, spleen and intestinal spiral valve (ISV).
Science
Although I did not take this approach in my undergraduate research, in Ivor Knight's lab at JMU, I did use molecular techniques to study urease genes in bacteria that had been isolated from the spiral valve of carcharind sharks.
Science & Research
Human-verified similar examples from authoritative sources
Similar Expressions
41 human-written examples
This paper will show how different lead-acid battery technologies comply with these new demands, from an improved version of the conventional flooded SLI battery to the high performance of spiral wound valve-regulated lead-acid (VRLA) battery.
Science
This paper updates work carried out to develop spiral wound valve-regulated lead-acid (VRLA) batteries for vehicles with different hybridisation degrees, ranging from stop-start to mild hybrid applications.
Science
Work presented in this paper deals with the study of different design parameters, manufacturing process and charging conditions of spiral wound valve-regulated lead-acid (VRLA) batteries, in order to improve their reliability and cycle life for hybrid vehicle applications.
Science
Subjects underwent retrospectively ECG-gated spiral MDCT of the aortic valve region (Somatom Definition Flash, Siemens, Forchheim, Germany).
Science
1. Vessel calcification (VC), including those of the aorta, coronary artery, and cardiac valves, as determined by spiral computed tomography.
Science
Expert writing Tips
Best practice
When writing about anatomy or engineering, ensure you're using "spiral valve" in the correct context, referring to a valve structure with a spiral or helical shape. Specify the location of the valve (e.g., in the intestine) for clarity.
Common error
Avoid using "spiral valve" to describe other types of valves (e.g., heart valves) that don't have a spiral shape. Ensure the context clearly indicates a physical spiral structure.
Source & Trust
80%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "spiral valve" functions primarily as a noun phrase, identifying a specific anatomical structure or an engineering component characterized by its spiral shape. As confirmed by Ludwig AI, this phrase accurately describes a real feature.
Frequent in
Science
40%
Encyclopedias
25%
Wiki
15%
Less common in
News & Media
15%
Formal & Business
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "spiral valve" accurately describes a structure characterized by its spiral or helical shape, as confirmed by Ludwig AI. Predominantly used in scientific and anatomical contexts, it identifies a specific type of valve found in certain species' intestines or engineered systems. Its function primarily involves increasing surface area for enhanced absorption or efficient fluid flow control. While grammatically correct and commonly used, especially in formal and scientific writing, it's important to specify the location of the valve when referencing it. Alternatives like "helical valve" or "intestinal spiral valve" can provide further context. Overall, understanding the proper usage of "spiral valve" ensures clarity and precision in scientific or technical communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
helical valve
This alternative emphasizes the helical shape of the valve, which is a key characteristic, and is almost perfectly interchangeable with QUERY in most contexts.
intestinal spiral valve
This phrase places the spiral element in the context of the intestine, specifying its location and function.
spiral fold in intestine
This alternative highlights the location and structure of the spiral valve within the intestinal tract, adding anatomical context.
twisted intestinal valve
This explicitly states the twisting nature and intestinal location of the valve.
valve with spiral structure
This is a more descriptive alternative, emphasizing the structural characteristic of the valve.
spiral shaped valve
Describes the shape of the valve.
torsion valve
This alternative highlights the torsion or twisting nature of the valve's structure.
corkscrew valve
This emphasizes the corkscrew shape, which may be more visually descriptive but less precise.
internal spiral structure
This focuses on the internal configuration, which creates the valve-like function.
valve with a twist
This is a more figurative and less technical way to describe a valve with a spiral or helical component.
FAQs
How is a "spiral valve" different from other valves?
A "spiral valve" is distinguished by its unique spiral or helical shape, unlike other valves that may rely on different mechanisms for regulating flow, such as flaps or gates. The spiral structure increases surface area, which is crucial for nutrient absorption in some species.
Where can I find a "spiral valve" in nature?
The "spiral valve" is most commonly found in the intestines of sharks, rays, and some primitive fish species, where it enhances nutrient absorption.
What is the function of a "spiral valve"?
The primary function of a "spiral valve" is to increase the surface area within the intestine, which enhances nutrient absorption from digested food. It also slows down the passage of food, allowing more time for absorption.
Are there any "helical valves" in engineering applications that are similar to the biological "spiral valve"?
While not directly analogous, some engineered valves use helical or spiral designs to control fluid flow or pressure. These designs may not replicate the exact function of the biological "spiral valve" but share a similar structural principle.
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
80%
Authority and reliability
4.6/5
Expert rating
Real-world application tested