We found 2 dictionaries that define the word solar months:

General (2 matching dictionaries)

1. solar months: Collins English Dictionary
2. solar months: Vocabulary.com

(Note: See solar_month as well.)

Definitions from WordNet (solar month) ▸ noun:  one-twelfth of a solar or tropical year ▸ Also see solar_month ▸ Words similar to solar months ▸ Usage examples for solar months ▸ Idioms related to solar months ▸ Wikipedia articles (New!) ▸ Words that often appear near solar months ▸ Rhymes of solar months ▸ Invented words related to solar months