Logeion 4+

The University of Chicago

Designed for iPad

    • 4.7 • 48 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

4.7 out of 5
48 Ratings

48 Ratings

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.

Brian W. Davidson ,

Almost perfect

The only thing keeping this app from being 5 stars is the small text size. Hoping to see the ability to adjust the text size in version 2.1.

This app is, however, such a quality piece of work. I don't know of a better free app on the market. As a matter of fact, if all you are looking for is a digital lexicon, Logeion is even better than the apps you pay for. It just works, and does so quickly.

If you read Greek or Latin, you gotta have Logeion.

dcreader6 ,

The one classics reference to get!

After having a few different Latin and Greek dictionary apps on my phone, I happened upon Logeion and was instantly won over.

Ease of use, selection of reference sources, comprehensiveness—it ticks all the boxes.

My go-to for any translating/reading as an advanced beginner working to learn both languages.

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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