We found 7 dictionaries that define the word poisonous substance:

General (6 matching dictionaries)

1. poisonous substance: Vocabulary.com
2. poisonous substance: Dictionary.com
3. poisonous substance: Rhymezone
4. poisonous substance: FreeDictionary.org
5. poisonous substance: Mnemonic Dictionary
6. poisonous substance: TheFreeDictionary.com

Computing (1 matching dictionary)

7. poisonous substance: Encyclopedia

(Note: See poisonous_substances as well.)

Definitions from WordNet (poisonous substance) ▸ noun:  any substance that causes injury or illness or death of a living organism Types: arsenic, cyanide, lead, mercury, polonium, thallium, more... ▸ Words similar to poisonous substance ▸ Usage examples for poisonous substance ▸ Idioms related to poisonous substance ▸ Wikipedia articles (New!) ▸ Words that often appear near poisonous substance ▸ Rhymes of poisonous substance ▸ Invented words related to poisonous substance