Archimedes' __, Also Known as "pi"
This page is the CodyCross answer for the clue below from All Things Water, Group 1297, Puzzle 4 (Bora Bora and Tahiti).
Question
Archimedes' __, Also Known as "pi"
Answer
CONSTANT
Word Meaning:
CONSTANT — Unchanged through time or space; permanent.
Definitions from Wiktionary.