A bell curve is another name for a normal distribution curve (sometimes just shortened to "normal curve") or Gaussian distribution. The name comes from the fact it looks bell-shaped.
The Normal Distribution I Six Sigma TC
Gaussian/Normal Distribution and its PDF(Probability Density Function), by ashok .c
Bell curve graph hi-res stock photography and images - Alamy
Gaussian Distribution / Bell Curve Function - Statistics How To
Understanding the Normal Distribution Curve
Formula for the Normal Distribution or Bell Curve
How to Make a Bell Curve in Python? - GeeksforGeeks
Standard Deviation and Normal Distribution in Six Sigma
Normal Distribution
Formula for the Normal Distribution or Bell Curve
Normal Distribution -- from Wolfram MathWorld
Normal Gaussian Vector & Photo (Free Trial)
Normal Distributions & Bell Curves: Calculating Probabilities and Percentages Using Areas Under a Bell Curve