We found 4 dictionaries that define the word control groups:

General (3 matching dictionaries)

1. control groups: Collins English Dictionary
2. control groups: Wiktionary
3. Control groups: Wikipedia, the Free Encyclopedia

Medicine (1 matching dictionary)

4. Medical Dictionary (No longer online)

Phrases: Treatment and control groups, more... ▸ Words similar to control groups ▸ Usage examples for control groups ▸ Idioms related to control groups ▸ Wikipedia articles (New!) ▸ Words that often appear near control groups ▸ Rhymes of control groups ▸ Invented words related to control groups