We found 4 dictionaries that define the word plant kingdoms:

General (3 matching dictionaries)

1. plant kingdoms: Merriam-Webster
2. plant kingdoms: Collins English Dictionary
3. plant kingdoms: Vocabulary.com

Medicine (1 matching dictionary)

4. plant kingdoms: Merriam-Webster Medical Dictionary

(Note: See plant_kingdom as well.)

Definitions from Wiktionary (plant kingdom) ▸ noun:  Collectively, the set of all plants. ▸ Also see plant_kingdom ▸ Words similar to plant kingdoms ▸ Usage examples for plant kingdoms ▸ Idioms related to plant kingdoms ▸ Wikipedia articles (New!) ▸ Words that often appear near plant kingdoms ▸ Rhymes of plant kingdoms ▸ Invented words related to plant kingdoms