We found one dictionary that defines the word hickory trees:

General (1 matching dictionary)

1. hickory trees: Vocabulary.com

(Note: See hickory_tree as well.)

Definitions from WordNet (hickory tree) ▸ noun:  American hardwood tree bearing edible nuts ▸ Also see hickory_tree ▸ Words similar to hickory trees ▸ Usage examples for hickory trees ▸ Idioms related to hickory trees ▸ Wikipedia articles (New!) ▸ Words that often appear near hickory trees ▸ Rhymes of hickory trees ▸ Invented words related to hickory trees