Trig Ratio
This page is the CodyCross answer for the clue below from Prehistory, Group 1255, Puzzle 4 (Fruits and Nuts).
Question is: Trig Ratio
and the answer is: COTANGENT
Word Meaning:
COTANGENT — (trigonometry) In a right triangle, the reciprocal of the tangent of an angle. Symbols: cot, ctg, or ctn
Definitions from Wiktionary.