We found one dictionary that defines the word direct observation:

Medicine (1 matching dictionary)

1. online medical dictionary (No longer online)

▸ Words similar to direct observation ▸ Usage examples for direct observation ▸ Idioms related to direct observation ▸ Wikipedia articles (New!) ▸ Words that often appear near direct observation ▸ Rhymes of direct observation ▸ Invented words related to direct observation