Line From a Circle's Center to Its Perimeter
This page is the CodyCross answer for the clue below from Prehistory, Group 1260, Puzzle 5 (Last Ice Age).
Question is: Line From a Circle's Center to Its Perimeter
and the answer is: RADIUS
Word Meaning:
RADIUS — (anatomy) The long bone in the forearm, on the side of the thumb.
Definitions from Wiktionary.