Straight Line Touching a Curve but Not Crossing It
This page is the CodyCross answer for the clue below from Airport, Group 456, Puzzle 5 (American Airlines).
Question is: Straight Line Touching a Curve but Not Crossing It
and the answer is: TANGENT
Word Meaning:
TANGENT — (differential geometry) A straight line touching a curve at a single point without crossing it there.
Definitions from Wiktionary.