We found 18 dictionaries that define the word retarding:

General (13 matching dictionaries)

1. retarding: Merriam-Webster
2. retarding: Collins English Dictionary
3. retarding: Vocabulary.com
4. retarding: Wordnik
5. retarding: Cambridge Advanced Learner's Dictionary
6. retarding: Wiktionary
7. Retarding, retarding: Dictionary.com
8. retarding: Cambridge Essential American English Dictionary
9. Retarding: Online Plain Text English Dictionary
10. Retarding: AllWords.com Multi-Lingual Dictionary
11. retarding: Webster's 1828 Dictionary
12. retarding: FreeDictionary.org
13. retarding: TheFreeDictionary.com

Business (1 matching dictionary)

14. retarding: Legal dictionary

Computing (1 matching dictionary)

15. retarding: Encyclopedia

Medicine (2 matching dictionaries)

16. retarding: Merriam-Webster Medical Dictionary
17. retarding: Medical dictionary

Slang (1 matching dictionary)

18. retarding: Urban Dictionary

(Note: See retard as well.)

Definitions from Wiktionary (retarding) ▸ noun:  A slowing or hindrance. Similar: slow, slow up, slow down, decelerate, imbecile, half-wit, idiot, moron, changeling, check, more... Opposite: accelerating, advancing, progressing, hastening Phrases: retarding force, retarding basin, more... ▸ Words similar to retarding ▸ Usage examples for retarding ▸ Idioms related to retarding ▸ Wikipedia articles (New!) ▸ Popular adjectives describing retarding ▸ Words that often appear near retarding ▸ Rhymes of retarding ▸ Invented words related to retarding