We found 4 dictionaries that define the word PTDI:

General (2 matching dictionaries)

1. PTDI: Dictionary.com
2. PTDI: Wiktionary

Miscellaneous (2 matching dictionaries)

3. PTDI: Acronym Finder
4. AbbreviationZ (No longer online)

Definitions from Wiktionary (PTDI) ▸ noun:  (toxicology) Initialism of provisional tolerable daily intake. ▸ Words similar to PTDI ▸ Usage examples for PTDI ▸ Idioms related to PTDI ▸ Wikipedia articles (New!) ▸ Popular adjectives describing PTDI ▸ Words that often appear near PTDI ▸ Rhymes of PTDI ▸ Invented words related to PTDI