What You Need to know about the Plural of Appendix

The plural form of “appendix” is a curious topic that can trip up even the most seasoned writers. Unlike regular nouns, “appendix” has two accepted plural forms: “appendices” and “appendixes”. Why two versions? And when should you use each one? This guide dives deep into the origins and meanings of both plurals, equipping you with the confidence to use them correctly across various contexts.

Choosing the right plural often depends on the tone and purpose of your writing. In academic or formal settings, you might see “appendices” used to convey a scholarly tone, while “appendixes” can work in more casual writing. But there’s more to it each plural form has a unique history and usage. Here, we’ll explore how to decide between “appendices” and “appendixes,” with real-life examples for each to help you navigate this plural world seamlessly.

Let’s clarify the nuances of these forms, understand how each fits into written materials, and see how it might apply to you in spoken language.

So, What Do You Call the Plural of “Appendix”?

When it comes to the plural appendix, both “appendices” and “appendixes” are technically correct, but they’re used in slightly different contexts. “Appendices” is the more traditional choice, originating from Latin, while “appendixes” aligns with regular English plural rules. Let’s look at each form:

• Appendices: Often favored in academic writing and formal documents, “appendices” reflects the word’s Latin roots, lending a certain academic sophistication to your work. If you’re writing a research paper or thesis, “appendices” may add a scholarly authority to your document.
• Appendixes: This form is more common in casual writing or spoken language. If you’re preparing a less formal report, “appendixes” might feel more approachable and conversational.

Examples of How to Use Each Plural Form of “Appendix”

Here are few Examples of How to Use Each Plural Form of “Appendix”:

Academic Paper or Thesis

Example: In an academic paper, “appendices” are typically listed at the end, offering supplementary information without interrupting the main content. Let’s say you’re finishing a research project, and your paper includes several tables and figures that support your findings. Here’s how you might phrase it:

“Refer to the appendices at the end of this document for detailed tables and additional data sources.”

Using “appendices” here suggests that the author is aware of academic conventions and wants to convey a formal tone.

Informal Report or Business Document

Example: For a business document or a more casual report, “appendixes” can be effective in keeping the language straightforward. Imagine you’re preparing a quarterly report for your team, and you want to include a few extra charts in the back. Here’s a way to frame it:

“Please check the appendixes for further breakdowns of the quarterly data.”

This usage makes the document feel less rigid, signaling a casual tone that fits an everyday business environment.

So, Which One Should You Use?

When deciding between appendices and appendixes, context is key. Here are some tips:

• Academic or Scholarly Work: Use “appendices” to maintain a formal, professional style.
• General Business or Informal Communication: “Appendixes” might feel more appropriate, keeping things simple and direct.

Quick Reference for Using “Appendix” in Plural Form

Context	Preferred Plural Form	Tone	Example
Academic Writing	Appendices	Formal	“Refer to the appendices for supporting materials and references.”
Casual Report	Appendixes	Informal/Conversational	“Details are provided in the appendixes at the end of this report.”
Medical Context	Appendixes	Technical	“The surgeon removed both inflamed appendixes during the procedure.”

Pro Tips

When deciding between “appendices” and “appendixes”, keep the following in mind:

• Purpose & Tone: Always consider the purpose of your document. If it’s a formal or academic paper, “appendices” is the safer choice.
• Audience Expectations: Consider who will read your content. Scholarly authority is often expected in academic work, whereas casual writing feels more approachable in business or informal settings.
• Clarity over Tradition: In some cases, readers may be more familiar with “appendixes” as a straightforward plural. Choose whichever form maintains clarity and coherence without losing professionalism.

Final Thoughts

Whether you choose “appendices” or “appendixes” depends largely on the tone and audience of your writing. While both are correct, aligning your choice with the purpose and formality of your document ensures that your writing feels polished and appropriate. So, next time you find yourself in need of the plural form of appendix, you’ll know exactly which one to pick.