We found one dictionary that defines the word line doubles:

General (1 matching dictionary)

1. line doubles: Vocabulary.com

(Note: See line_double as well.)

Definitions from WordNet (line double) ▸ noun:  a double resulting from a line drive ▸ Also see line_double ▸ Words similar to line doubles ▸ Usage examples for line doubles ▸ Idioms related to line doubles ▸ Wikipedia articles (New!) ▸ Words that often appear near line doubles ▸ Rhymes of line doubles ▸ Invented words related to line doubles