Eudic is a macOS dictionary and vocabulary-management application that couples its own bundled reference content with support for the open MDX dictionary format — turning a single app into a configurable, multi-source word-research station that grows with your needs.
What is Eudic?
Eudic is a dedicated dictionary and vocabulary-tracking app for Mac that goes well beyond what Apple's built-in Dictionary.app can offer. The defining distinction is its embrace of the MDX open dictionary format, a standard that gives language enthusiasts and researchers access to a large ecosystem of community-built and commercially licensed reference works — from broad general-purpose English dictionaries to specialist glossaries covering medicine, law, computing, and dozens of other domains. Load the dictionaries that fit your workflow and every subsequent lookup draws on all of them at once, surfacing results from multiple sources in a single unified panel.
What does Eudic do best?
The hotkey-triggered popup window is the feature I reach for a dozen times a day. Position your cursor over any word in Safari, a PDF viewer, Notes, or most other macOS apps, tap the assigned shortcut, and a slim floating panel delivers definitions, usage examples, and pronunciation audio without pulling you out of your reading context. After a week it becomes invisible infrastructure — you only feel its absence when you're on a machine without it.
The vocabulary workbook is the second standout. Eudic maintains a persistent log of every word you look up, lets you star entries and organise them into custom lists, and tracks how often you return to each one so you can spot which words still aren't settling into memory. It won't replace a dedicated spaced-repetition system like Anki, but for the organic, context-first vocabulary building that comes from reading heavily and saving as you go, the workbook earns its keep.
For serious language learners, the MDX ecosystem is the real differentiator. Free community dictionaries, bilingual reference works, and premium packs can all coexist inside the same interface, letting you compare definitions and translations side by side rather than juggling three browser tabs.
Is Eudic free?
Yes — the core app is free to download, and the free tier covers everyday lookups and basic word-list management with enough generosity to be genuinely useful. A paid upgrade unlocks the full vocabulary-study suite, advanced organisational features, and additional bundled reference content. Pricing shifts periodically, so check the developer's website for current figures rather than trusting any number printed elsewhere.
Who should use Eudic?
Anyone who reads densely on a Mac will find that Eudic repays its short learning curve quickly. The primary audience is non-native English speakers working through academic papers, technical documentation, or novels — but native speakers operating in specialist fields benefit equally. Translators, researchers, clinicians who've imported a medical dictionary, legal writers with Black's Law loaded alongside a usage guide — all of them get meaningfully more out of Eudic than they would from tabbing to a browser every time Dictionary.app comes up empty.
If you only occasionally wonder about a word and the macOS three-finger-tap on the trackpad already satisfies you, Eudic is probably more machinery than you need. But if you've ever opened a browser tab purely to look something up mid-paragraph, that friction is exactly what Eudic eliminates.
What are the best Eudic alternatives?
macOS Dictionary.app is the obvious zero-effort comparison — free, always installed, and perfectly adequate for casual monolingual English lookups, but a completely closed system with no extensibility whatsoever. Mdict shares Eudic's MDX-format philosophy and is worth a look if you want a lighter interface, though its Mac implementation is less polished. For quick lookups without vocabulary tracking, the dictionary integration built into Raycast is convenient but shallow — it delegates to the same Apple reference pool as Dictionary.app. DeepL and Google Translate both ship native Mac apps optimised for sentence-level translation rather than definition depth. None of them combine an extensible dictionary stack, persistent vocabulary logging, and hotkey popup lookup in a single well-maintained package the way Eudic does.
