Third Level; Former Term for Part of the Cenozoic
This page is the CodyCross answer for the clue below from Space Exploration, Group 914, Puzzle 1 (Unpiloted Probes).
Question
Third Level; Former Term for Part of the Cenozoic
Answer
TERTIARY
Word Meaning:
TERTIARY — Of third rank or order; subsequent.
Definitions from Wiktionary.