# Science Dictionary by Farlex — Biology, Physics, & More > Comprehensive science dictionary with extensive terms, images, and audio pronunciations. (iPhone/iPad app by Farlex, Inc..) - Source: https://appshunter.io/ios/app/science-dictionary-by-farlex/id1021592299 (this page in markdown: same URL + `.md`) - Developer: [Farlex, Inc.](https://appshunter.io/developer/379450386) - Category: Reference, Education - Price: Free with in-app purchases - Rating: 4.60/5 from 410 App Store ratings · 78 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 60 MB - Released: 2015-09-11 - Data updated: 2026-06-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/science-dictionary-by-farlex/id1021592299/reviews.md ## What is Science Dictionary by Farlex? Science Dictionary by Farlex gives you free, instant access to more than 100,000 scientific terms, thousands of images, and more than 35,000 audio pronunciations from multiple authoritative science encyclopedias and dictionaries covering all scientific fields. Whether you're a student, professional, or just curious about the world around you, this free science dictionary app can help you find clear, in-depth definitions of science terminology right on your iPhone or iPad. Search across multiple disciplines for entries on: Biology Physics Chemistry Geology Astronomy Oceanography Environmental science Computer science + much more… FEATURES: * Search 100,000+ terms across all scientific fields from top sources you won't find anywhere else. * Learn by seeing: Thousands of diagrams, illustrations, and more. * Save unlimited bookmarks to quickly access your favorite articles. * Use native voice search to look up a word just by saying it. (With supported devices) * See search suggestions as you type and always find what you're looking for. * View your recent searches. * Perform advanced searches, including "Starts with," "Ends with," "Contains," and "Wildcard." * Listen to 35,000+ audio pronunciations for both American and British speakers. * Adjust font size. * Share definitions via social networks, email, and text. (With supported devices) User-friendly, Comprehensive, and Authoritative: Science Dictionary by Farlex is the perfect free scientific dictionary for students, professionals, and anyone looking to learn more about the world of science. This is NOT a preview or a trial version, and there is no "locked" content. Open the app on your iPhone or iPad and immediately access all content — no subscriptions required! How do we do it? TheFreeDictionary.com - Farlex apps have been downloaded tens of millions times across multiple platforms, with top ratings after hundreds of thousands of reviews. We work with the best publishers to bring together trusted content in the most comprehensive, authoritative dictionary apps on the market. Our flagship app is The Free Dictionary (TFD), powered by TheFreeDictionary.com. Find our other apps by searching "Dictionary by Farlex" in the App Store. ## Key features - 100,000+ scientific terms - Thousands of images and diagrams - 35,000+ audio pronunciations - Unlimited bookmarks - Native voice search - Advanced search options - Share definitions ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Ad-free upgrade | $4.99 | one-time | ## What do users think of Science Dictionary by Farlex? Overall sentiment: positive **Pros** - 👍 Useful and easy to learn scientific terms - 🚀 Quick and efficient access to definitions - 💡 Helpful for students in science classes - 👍 Comprehensive dictionary with many terms - 👍 Great for self-improvement and learning **Cons** - 🐛 Missing definitions for some specialized terms - 🐛 Varying depth of definitions across terms - 💡 Could use more features like folders, customization - 🔒 Requires login, which some users dislike **Commonly reported bugs** - App not opening after recent update for some users - Excessive ads that disrupt the user experience **Most requested features** - Add more ecology and biology-specific terms - Make terms in definitions clickable to navigate - Implement a homepage with science-related content - Allow users to create custom folders/categories ## Recent user reviews (10 of 78) All indexed reviews: https://appshunter.io/ios/app/science-dictionary-by-farlex/id1021592299/reviews.md ### 4/5 — Needs Ecology Words *2025-09-21* Honestly a great dictionary, but I teach Marine Biology and I would love for my students to have access to a full biology/ecology dictionary as well. But I still give 4 stars. ### 5/5 — Super useful *2025-03-22* I think this is a super lovely app that explains everything very well for what it is. my only suggestion would be to make it where the other terms in the explanation that are complex enough to be in the definition are clickable and transfer you to them, simply so it takes less time, but i think it’s a wonderful and incredibly useful app. ### 5/5 — Perfect for High School Science *2024-07-07* I purchased this app to assist my high schooler with learning differences. She has terrible working memory and asking her to go back and find a forgotten term in the book can completely derail her ability to stay on task during more challenging assignments. This is the perfect solution. She is able to quickly look up a term and move on with the work at hand. Obviously if the issue is understanding instead of memory, she still has to crack open the text to get a full explanation of a term, but this is perfect for jogging her memory. ### 5/5 — great *2024-01-06, version 3.5* useful and easy to learn the meaning of scientific express ### 3/5 — Why can’t I add this app to my home screen in focus mode? *2023-08-09, version 3.5* I’m a graduate student and would find it really helpful if I could check definitions while reading journal articles without being distracted by other apps. Unfortunately, this app doesn’t appear in the “allowed apps” settings on focus mode. Would absolutely rate it higher if this could be fixed ### 3/5 — Ok, but needs work… *2023-02-05* I recently downloaded this app and purchased its ad-free version. The level of definition varies greatly in depth from term to term. Some definitions dive deeply, and prove very educationally informative. Others just scratch the surface, offering little more than the person looking up the word would already know. Upon first purchasing this app, I ran a little test to see how it would do. After requesting terms of increasing scientific speciality— but not words so esoteric that they would be used by only a select few — I reached the bottom… no definition available for the requested term. I’d say that the app is somewhat useful, and shows great potential, but as a comprehensive stand-alone scientific dictionary, it’s not there, yet. I would hope the developers keep working on the app, moving it toward a more fulfilling realization of the promise it sometimes shows. ### 4/5 — Folders please! *2022-03-25* Give me the ability to categorize and label infinite folders for different individual entries. Please. And thanks. ### 5/5 — So far, so right on *2021-09-12* Just a very new user but the words I am looking up (not the 10 part words), have all been there. I also like the disambiguation feature. ### 5/5 — Great 👍🏿 *2021-08-17* 10/10 must try again ### 1/5 — Not a science app *2021-08-09, version 3.2* Just look up Homeopathy, and you’ll see what I mean. More a misleading dictionary. I’m not saying everything in it is wrong, but it’s by no means ‘science’ if it defines even the low hanging fruit of fringe nonsense/scam pseudosciences in a way which their proponents of said pseudosciences would. Not one caveat in the description of homeopathy, and certainly not an accurate description. ## Frequently asked questions about Science Dictionary by Farlex ### What is Science Dictionary by Farlex? Science Dictionary by Farlex provides free, instant access to over 100,000 scientific terms, thousands of images, and more than 35,000 audio pronunciations. It covers multiple scientific fields like biology, physics, chemistry, and geology, offering clear and in-depth definitions. ### What are the key features of this science dictionary app? Key features include searching over 100,000 terms from top sources, viewing thousands of diagrams and illustrations, saving unlimited bookmarks, using native voice search, and listening to over 35,000 audio pronunciations. It also offers advanced search options and the ability to share definitions. ### Is Science Dictionary by Farlex free to use? Yes, the app provides free access to all its content, with no preview or trial limitations, and no subscriptions required. It is a completely free scientific dictionary. ### What scientific fields does the app cover? The app covers a wide range of scientific fields including Biology, Physics, Chemistry, Geology, Astronomy, Oceanography, Environmental science, and Computer science, among many others. ### Who is the target audience for this app? This app is designed for students, professionals, and anyone who is curious about the world and wants to understand scientific terminology. It's a comprehensive resource for learning about science. ## Version history (last 5 releases) ### 3.5 — 2023-05-31 * Bugfixes ### 3.2 — 2021-01-10 * Optimization for iOS 14 ### 2.0 — 2019-09-01 * Support for iPhone X * Bug fixes ### 1.7 — 2016-11-16 * Fixed bugs, including crash issue when starting without Internet connection. ### 1.5 — 2016-09-17 * Optimized for iOS 10. ## Apps similar to Science Dictionary by Farlex | App | Rating | Price | Category | | --- | --- | --- | --- | | [Merriam-Webster Dictionary](https://appshunter.io/ios/app/merriam-webster-dictionary/id399452287) | 4.9 (3,150) | Free | Reference | | [Arabic Dictionary - Dict Box](https://appshunter.io/ios/app/arabic-dictionary-dict-box/id425129943) | 4.6 (27,541) | Free | Reference | | [MOJisho: Japanese Dictionary](https://appshunter.io/ios/app/mojisho-japanese-dictionary/id1021094295) | 4.8 (1,434) | Free | Reference | | [Eng-Mm Dictionary](https://appshunter.io/ios/app/eng-mm-dictionary/id1035153899) | 4.5 (958) | Free | Reference | | [Terminology](https://appshunter.io/ios/app/terminology/id687798859) | 4.7 (1,041) | Free | Reference | | [Yomiwa - Japanese Dictionary](https://appshunter.io/ios/app/yomiwa-japanese-dictionary/id670931120) | 4.7 (1,098) | Free | Reference | ## More apps by Farlex, Inc. - [Dictionary.](https://appshunter.io/ios/app/dictionary/id379450383) - [Dictionary and Thesaurus Pro](https://appshunter.io/ios/app/dictionary-and-thesaurus-pro/id492085918) - [WordHub](https://appshunter.io/ios/app/wordhub/id725539262) - [Medical Dictionary by Farlex](https://appshunter.io/ios/app/medical-dictionary-by-farlex/id1015991271) - [Financial Dictionary by Farlex](https://appshunter.io/ios/app/financial-dictionary-by-farlex/id1021224324) - [Legal Dictionary](https://appshunter.io/ios/app/legal-dictionary/id1021283555) All apps by Farlex, Inc.: https://appshunter.io/developer/379450386 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*