Under index

USAGE SUMMARY

Sentence The phrase 'under index' is not a complete or grammatically correct sentence in and of itself.
It is a prepositional phrase that could be used to modify a noun or a verb, or to introduce a noun phrase. For example, you could say: "My physics teacher is always under indexing the various formulas."

⚠ May contain grammatical issues

Human-verified similar examples from authoritative sources

Similar Expressions

59 human-written examples

Android devices (including Fire Phone, which uses a forked version of Android) do under-index - though not much.

The Guardian - Tech

(BlackBerry devices under-index on Chitika, making up 0.5% of browsing, but having 2.4% of the installed base).

The Guardian - Tech

But what if Fire Phones "under-index" on Chitika's system - that is, they don't show up on its ad networks as much as other devices, because their users are (for example) all spending time on Amazon buying things, rather than browsing the parts of the web that Chitika supplies ads for?

The Guardian - Tech

On that basis, you could argue that if the Amazon Fire Phone under-indexes, it probably isn't by much; you could multiply the number by 25%, based on the average of the Samsung and HTC figures.

The Guardian - Tech

To explain "under-indexing", imagine there are 100 owners of device A, and 100 owners of device B, and 100 of device C. If owners of A and C use their devices online an equal amount of time, but device B owners spend only half their time online, a system that measures web impressions will report that there are half as many owners of device B. One would say that device B "under-indexes".

The Guardian - Tech

"Given the popularity of game apps you might expect that Millennials drive that usage," explains Khalaf, "but in fact they under-index for game app usage.

TechCrunch

Probably the biggest finding is that this group under-indexes on mobile games, as compared with the rest of the mobile population.

TechCrunch

Women under-index in the top ranks.

Huffington Post

The statistical significance between the areas under indices receiver operating characteristic curves was calculated by the DeLong method.

BMC Endocrine Disorders

For math competence the average Capability Under-Utilisation Index was rather neutral with MCUUI-Math = -0.001 (SD = 0.02).

Large-scale Assessments in Education

Figure 3 The relation between math-science coherence and the capability under-utilisation index for science and problem solving scores across the 41 countries.

Large-scale Assessments in Education

Expert writing Tips

Best practice

When intending to convey that something is lower than an index value, ensure clarity by using more descriptive phrasing like "below the index" or "less than the indexed value".

Common error

Avoid using the phrase "under index" as a standalone term, as it lacks clear grammatical structure. Ensure you articulate the relationship between the subject and the index, for example, "performing below the expected index".

Linguistic Context

The phrase "under index" functions as a prepositional phrase, but its grammatical role is unclear without additional context. Based on Ludwig AI analysis, the phrase by itself is incomplete and grammatically incorrect.

Expression frequency: Missing

Frequent in

Science

0%

News & Media

0%

Formal & Business

0%

Less common in

Science

0%

News & Media

0%

Formal & Business

0%

Ludwig's WRAP-UP

In summary, the phrase "under index" is generally considered grammatically incorrect and lacks widespread usage across authoritative sources. Ludwig AI confirms that the phrase is incomplete and requires additional context to be meaningful. For clearer communication, it's best to use alternative phrases such as "below the index" or "less than the index value". While "under index" might occasionally appear in informal settings, it's advisable to avoid it in formal or professional writing to ensure clarity and precision.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

Performing below the index

This highlights performance that is not up to the level of the established index.

Lower than the index

This directly indicates a position that is less than the index value.

Less than the index benchmark

This specifies that something is not meeting the benchmark set by an index.

Below the reference index

This emphasizes that the value is lower than a stated reference index.

Below index value

This alternative clarifies that the subject is positioned beneath a specific index score.

Not achieving the index

This indicates non-attainment of a particular index value or target.

Sub-index level

This alternative emphasizes a level or category that is a subdivision of an index.

Under the index threshold

This refers to being below a critical threshold or limit defined by the index.

Underneath the indexed score

This emphasizes physical or hierarchical placement below an indexed point.

Failing to meet index standards

This highlights a failure to achieve a benchmark set by an index.

FAQs

How can I clearly express that something is below a specific index?

Instead of "under index", use clearer phrases such as "below the index", "lower than the index value", or "less than the index benchmark".

What are some alternatives to using the phrase "under index"?

Alternatives include phrases such as "sub-index level", "below index value", or "not achieving the index depending on the specific context".

Is "under index" grammatically correct in formal writing?

No, "under index" is not considered grammatically correct in formal writing. It is recommended to use more explicit and structured phrases to convey your intended meaning, such as "performing below the index".

How does "under index" differ from "below the index" in meaning?

"Under index" is vague and lacks standard usage. "Below the index" is a clearer way to indicate that something is less than a specified index or benchmark, which is why it's preferred in formal or technical contexts.