We found 2 dictionaries that define the word pool balls:

General (1 matching dictionary)

1. pool balls: Vocabulary.com

Slang (1 matching dictionary)

2. pool balls: Urban Dictionary

(Note: See pool_ball as well.)

Definitions from WordNet (pool ball) ▸ noun:  ball used in playing pool ▸ Also see pool_ball ▸ Words similar to pool balls ▸ Usage examples for pool balls ▸ Idioms related to pool balls ▸ Wikipedia articles (New!) ▸ Words that often appear near pool balls ▸ Rhymes of pool balls ▸ Invented words related to pool balls