"three-Headed" Muscle on the Back of the Upper Arm
This page is the CodyCross answer for the clue below from Space Exploration, Group 910, Puzzle 2 (Johannes Kepler).
Question is: "three-Headed" Muscle on the Back of the Upper Arm
and the answer is: TRICEPS
Word Meaning:
TRICEPS — (anatomy) Any muscle having three heads.
Definitions from Wiktionary.