in duplicate

USAGE SUMMARY

The phrase "in duplicate" is correct and commonly used in written English.
It means a copy or a duplicate version of something. It is often used in legal and business documents. Example: Please fill out the form in duplicate and return one copy to our office. The contract must be signed in duplicate by both parties. The report was submitted to the board in duplicate for review. Note: "In triplicate" can also be used in the same way, when three copies are required.

✓ Grammatically correct

Science

Academia

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Samples were measured in duplicate.

Nature

Submit fiction entries in duplicate.

Yale University

Genotyping was performed in duplicate.

Duke University

Measurements were conducted in duplicate.

AMB Express

Experiments were conducted in duplicate.

AMB Express

Samples were run in duplicate.

Natural Products and Bioprospecting

Samples were assessed in duplicate.

EJNMMI Radiopharmacy and Chemistry

This was done in duplicate.

Pastoralism

Experiments were done in duplicate.

AMB Express

Assays were performed in duplicate.

Intensive Care Medicine Experimental

Data was abstracted in duplicate.

Plosone

Expert writing Tips

Best practice

When using "in duplicate", ensure the context clearly indicates that two identical copies are required or have been made. This is particularly useful in formal or legal settings where clarity is essential.

Common error

Avoid using "in duplicate" when you actually mean 'redundantly' or 'repetitively'. "In duplicate" specifically refers to the creation or existence of two identical copies, not simply the act of repeating something.

Linguistic Context

The phrase "in duplicate" functions as an adverbial phrase specifying the manner in which something is done or exists. As Ludwig AI indicates, it modifies a verb, adjective, or another adverb to indicate that something is present as two identical copies. Examples found in Ludwig show it often describes how samples are measured, tests are done, or documents are submitted.

Expression frequency: Very common

Frequent in

Science

70%

Academia

20%

Formal & Business

10%

Less common in

News & Media

0%

Encyclopedias

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, the phrase "in duplicate" is a grammatically correct and frequently used term, particularly within scientific, academic, and formal contexts. As Ludwig AI states, it signifies that something exists or is done as two identical copies. While synonyms like "two copies" or "in twofold" exist, it's important to use "in duplicate" when precision and clarity are paramount, especially in settings requiring careful documentation. Common errors include confusing it with terms implying simple repetition. Usage data confirms its prevalence in scientific and academic writing, reflecting its value in ensuring accuracy and redundancy.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

in two copies

Emphasizes the physical existence of two identical copies.

duplicated

A single-word adjective to describe something that has been copied.

copied verbatim

Implies an exact, word-for-word replication.

twice over

Suggests doing something two times, often for emphasis or thoroughness.

in twofold

More formal and emphasizes a dual or double aspect.

in replica

Focuses on creating an exact copy or reproduction.

repeated

Highlights the action of repeating something, rather than the existence of a copy.

in repetition

Similar to 'repeated', but emphasizes the process of repetition.

in redundancy

Implies that something is unnecessarily repeated or excessive.

in parallel

Suggests performing the same action or process simultaneously.

FAQs

How is "in duplicate" used in a sentence?

You can use "in duplicate" to specify that something should be created or submitted as two identical copies. For example, "Please submit the application form "in duplicate"".

What does "in duplicate" mean?

"In duplicate" means that something is made or exists as two identical copies. It is often used in formal contexts where a record needs to be kept by multiple parties.

Are there synonyms for "in duplicate"?

Yes, you can use phrases like "two copies", "twice over", or "in twofold", although the best choice depends on the specific context.

When is it appropriate to use "in duplicate" in formal writing?

Use "in duplicate" in formal writing when you need to explicitly state that a document or item must be produced or submitted as two identical copies. This is common in legal, business, and scientific contexts.