Simp·son 
(sĭmpsən), George Gaylord 1902-1984.
(sĭmpsən), George Gaylord 1902-1984. American paleontologist whose synthesis of population genetics with paleontology in his work on fossil mammals contributed to the development of modern evolutionary biology.
- dieter
- dietetic
- dietetically
- dietetics
- diethyl ether
- diethylstilbestrol
- diethyl toluamide
- dietician
- dietitian
- diet pyramid
- Dietrich
- Dietrich
- Dietrich
- Dietrich
- diff
- differ
- difference
- different
- differentia
- differentiability
- differentiable
- differential
- differential analyzer
- differential calculus
- differential coefficient