A chord in a circle is any line segment whose endpoints lie on the circumference of the circle. Unlike a diameter, which passes through the center of the circle and is the longest possible chord, there are many other chords.
For example, consider a circle with a center point at O and a radius of 5 units. You could draw a chord connecting two points on the circumference, such as points A (3, 4) and B (0, 5). The line segment AB would be a chord of the circle that is not a diameter, as it does not pass through the center O.
To visually identify it, you would plot points A and B on the circle's circumference and draw a straight line segment between them, which represents the chord.
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