Tree of the Genus Juglans
This page is the CodyCross answer for the clue below from Space Exploration, Group 920, Puzzle 1 (Hydrogen and Helium).
Question is: Tree of the Genus Juglans
and the answer is: WALNUT
Word Meaning:
WALNUT — A hardwood tree of the genus Juglans.
Definitions from Wiktionary.