Logeion 4+

The University of Chicago

Designed for iPad

    • 4.4 • 57 Ratings
    • Free



Use one app to look up any Greek or Latin word: Logeion was developed at the University of Chicago to provide simultaneous lookup of entries in the many dictionaries and reference works that make up the Perseus Classical collection. Most works represented in this app are based on digitized texts from the Perseus Digital Library at Tufts University. In addition, for frequent words, some frequency and collocation information is given plus examples from the corpus at perseus.uchicago.edu.

• Liddell and Scott's Greek-English Lexicon (1940)
• DGE (Diccionario Griego–Español). In progress; up to έξαυος.
• Autenrieth's Homeric Dictionary
• Slater's Lexicon to Pindar (1969)
• Liddell and Scott's Intermediate Greek Lexicon (1889)
• NEW: Woordenboek Grieks/Nederlands (in progress).

• Lewis and Short, Latin-English Lexicon (1879)
• NEW: The Dictionary of Medieval Latin from British Sources, ed. R. E. Latham, D. R. Howlett, & R. K. Ashdowne (London: British Academy, 1975-2013)
• Lewis's Elementary Latin Dictionary (1890)

The app draws data from the following Greek and Latin textbooks.
• NEW Frieze (rev. Dennison) Vergil’s Aeneid Books I-XII, with an Introduction, Notes, and Vocabulary
• Greek: An Intensive Course, by Hardy Hansen and Gerald M. Quinn
• Reading Greek: Grammar and Exercises, by Joint Association of Classical Teachers
• Learn to Read Greek, by Andrew Keller and Stephanie Russell
• Learn to Read Latin, by Andrew Keller and Stephanie Russell
• Introduction to Attic Greek (2nd edition), by Donald Mastronarde
• Wheelock's Latin, by Frederic M. Wheelock and Richard A. Lafleur
• Basiswoordenlijst Latijn [Basic Latin Vocabulary], by J.K.L. Babeliowsky, D. den Hengst, W. Holtland, W. van Lakwijk, J.Th.K. Marcelis, H. Pinkster, J.J.L. Smolenaars, Staatsuitgeverij (NEW: English translations of the example sentences)

What’s New

Version 2.0

This app has been updated by Apple to display the Apple Watch app icon.

• Simplified user interface for easier navigation.
• Added support for Slide Over and Split View Multitasking.
• Added recent searches above the word wheel.
• Added DMLBS, the Dictionary of Medieval Latin from British Sources, courtesy of the British Academy, as well as the first installments of the new Greek Dutch dictionary.
• Added lexicon on the Aeneid by Frieze (rev. Dennison), thanks to Christopher Francese at Dickinson College.
• Sentences from the Basic Latin Vocabulary have been translated into English.

Full bibliographic information and further information can be found by clicking the info button at the bottom of the word wheel. As always, please report problems through our “Report a Problem” link, which can also be found there.

Ratings and Reviews

4.4 out of 5
57 Ratings

57 Ratings

Average teacher ,

Can we get an update?

I love this app and use it almost every day. But it’s over four years old and not optimized for any of the newer phones from the last three years. It still runs in letterboxed format on any phone from the iPhone 10 or later. Can we get an update?

ridiculousforcednickname ,

Fantastic, until it started crashing

I use Logeion constantly on the web. Partly because about a year ago the app started crashing on both my iPad and iPhone. I love it immensely, but I really wish that it would work in ios again. Yes, my software is up to date. My iPad Pro is older, but it also fails on my iPhone 14 Pro.

But I love it enough to tell you to give it a try and be delighted if it works on your device. If it doesn’t, you should still use the web version.

As a Latin instructor I love the ability to show my students examples of how a word actually works in context using the usage examples. Rather than drag the giant OLD or Lewis (and Short) into the classroom I can just throw this on the board and model how to use a dictionary (and how wrong their textbook is at times, “Me, see, I told you this word is almost never found in existing texts, see that, ‘fewer than 50’.). I also love the concordance to commonly used Latin textbooks such as Learn to Read Latin or, shudder, Wheelock.

I love this app so much that I have not removed it from my devices in the faint hopes it will be updated and start working again. Please let this be so. Are offerings required? To Mercury? Minerva? Thoth? Hermes Trismegistos? Do Tell!

No one 😜 ,


As an alphabetically challenged Latin and Greek nerd, I use this app every day. I can’t believe it’s free and has no ads! So much faster than looking things up in a paper dictionary, and I absolutely love all the examples from different texts.

The only problem is that it’s very easy to click by accident on the wrong word from the suggestions list, and end up in an entry about a bizarre word that shows up once in extant literature when you just wanted to see if amo has a long or short a.

App Privacy

The developer, The University of Chicago, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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