영어사전 API

Google Translate API
- https://cloud.google.com/translate/docs
- 1M character = $20 (0.5M = $10)
- 홈페이지용 Google Translate Gadget은 무료

WordNet(Princeton University)
- http://wordnet.princeton.edu/wordnet/
- free
- DB다운로드 가능

abbreviations
- http://www.abbreviations.com/definitions_api.php
- free 1000 query/day

collins
- http://www.collinsdictionary.com/api/
- free for 5000 calls/month

Merriam-Webster
- http://dictionaryapi.com/
- free 1000 queries/day
- charge for commercial use

그 외
- 링크 모음 : http://www.programmableweb.com/search/dictionary