Refer to figure.
Let's break down each term related to wings in aviation:

1. Chord Line: The chord line of a wing is a straight line that connects the leading edge to the trailing edge of the wing. It serves as a reference line for various aerodynamic measurements and calculations. The chord line represents the imaginary line along which the wing's average thickness and curvature are measured.
2. Chord: The chord of a wing is the straight-line distance between the leading edge and the trailing edge of the wing, measured along the chord line. It essentially represents the width of the wing. Chord is an essential parameter in aerodynamics, used in calculations such as lift and drag coefficients.
3. Camber Line: The camber line is a curve that represents the curvature of the wing's upper and lower surfaces. It is the line equidistant between the upper and lower surfaces of the wing, along which the thickness of the airfoil is measured. The camber line helps characterize the aerodynamic performance of the wing, particularly regarding lift and drag generation.
4. Blade Thickness: Blade thickness refers to the thickness of the wing or airfoil at a particular point along its chord length. It is typically measured perpendicular to the chord line. The thickness of the wing's profile varies along its span, and understanding this variation is crucial for aerodynamic analysis and design optimization.

These terms are fundamental in aerodynamics and are used to describe the geometry and aerodynamic properties of wings and airfoils, which are critical components of aircraft design and performance.