an additional hr

USAGE SUMMARY

The phrase "an additional hr" is not correct in standard written English due to the abbreviation "hr" for "hour" being informal and lacking clarity.
You can use it in informal contexts, such as notes or casual communication, but it is better to use the full word "hour" in formal writing. Example: "I will need an additional hour to complete the project."

⚠ May contain grammatical issues

Science

Human-verified similar examples from authoritative sources

Similar Expressions

60 human-written examples

This policy will offset the increased costs induced by an additional HR-HPV testing in primary screening.

British Journal of Cancer

After 6 hr of exposure, cells were either collected into Trizol (6-hr time point), or washed and cultured in fresh serum for an additional 4 hr (10-hr time point).

Environmental and Molecular Mutagenesis

Factors that showed a statistically significant association with the time to first update as detected by univariate analysis were the inclusion of additional trials (HR 0.51; 95% CI 0.32 0.83), searching an additional database (HR 0.59; 95% CI 0.38 0.92), topic area in intrapartum issues (HR 1.86; 95% CI 1.03 3.37) and changed new review team (HR 0.20; 95% CI 0.6 0.66).

Plosone

Alternatively, cells were allowed to adhere for 2 hr and then incubated for an additional 2 hr with fibronectin or 70-kDa fragment before washing and fixation, or adhered for 1 hr and incubated for an additional 3 hr.

Plosone

Maximal IL-6 was secreted by THI-treated DCs by 8 hr, whereas controls needed an additional 12 hr.

Environmental Health Perspectives

Cells were then washed to remove MMS or HU, resuspended in SC-Met+/Cys+ medium, and incubated for an additional 4 hr with sampling every 2 hr.

G3: Genes, Genomes, Genetics

Cells were then fed with the steroid-reduced medium and cultured for an additional 48 hr before addition of DHT (0.1 μM) or E2 (1 μM; both from Sigma).

Environmental Health Perspectives

9 hr later, thymidine was re-added for an additional 15 hr, at which point cells were again released with deoxycytidine for 9 hr.

eLife

Media was changed to contain IWR1 or CHIR after 48 hr and cultures kept for an additional 48 hr.

eLife

Cells were plated onto 10-cm dishes, maintained in serum-free medium for 24 hr, and then transfected for an additional 24 hr before treatments using Fugene6.

Environmental Health Perspectives

After 24 hr, attached cells were treated for an additional 24 hr.

Environmental Health Perspectives

Expert writing Tips

Best practice

In formal writing, always spell out "hour" instead of using the abbreviation "hr". Use "an additional hour" for clarity and professionalism.

Common error

Avoid using informal abbreviations like "hr" in academic or professional contexts. While understandable, they detract from the credibility and clarity of your writing. Always use the full word "hour".

Linguistic Context

The phrase "an additional hr" functions as an adjective phrase modifying the noun "hr". Ludwig AI indicates that the abbreviation is not correct, so it is better to use the full term.

Expression frequency: Missing

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Less common in

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Ludwig's WRAP-UP

In summary, while the phrase "an additional hr" is understandable in informal conversation, it is grammatically incorrect for formal writing. Ludwig AI suggests that using the abbreviation "hr" is inappropriate for academic and professional contexts. Always opt for the full term, ""an additional hour"", to maintain clarity and professionalism in your writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

an additional hour

Replaces the abbreviation "hr" with the full word "hour" for improved formality and clarity.

one more hour

Uses simpler and more direct language to convey the same meaning.

an extra hour

Replaces "additional" with "extra", providing a slightly more informal tone.

a further hour

Uses "further" as a synonym for "additional", maintaining a formal tone.

another hour

Employs a more concise way to express the need for more time.

an added hour

Substitutes "additional" with "added", offering a slight variation in word choice.

a supplementary hour

Uses a more formal and less common synonym for "additional".

an incremental hour

Highlights the gradual increase in time, providing a specific nuance.

a remaining hour

Shifts the focus to the time left, rather than the time added.

an extension of one hour

Emphasizes the act of prolonging the duration by one hour.

FAQs

How should I properly write “an additional hr” in a formal context?

In formal writing, always use the full word “hour” instead of the abbreviation "hr". Write “"an additional hour"” for clarity and professionalism.

What can I say instead of “an additional hr” to sound more professional?

For a more professional tone, use phrases like “"an additional hour"”, “"one more hour"”, or “"an extra hour"”.

Is “an additional hr” grammatically correct?

No, “an additional hr” is not grammatically correct in formal writing. The abbreviation “hr” is informal. The correct usage is “"an additional hour"”.

What's the difference between “an additional hr” and “"an additional hour"”?

“An additional hr” is an informal way of saying “"an additional hour"”. The latter is the correct and preferred usage in formal and professional writing.