Y
- Yarkovsky effect – Ivan Osipovich Yarkovsky
- YORP effect – Ivan Osipovich Yarkovsky, John A. O'Keefe, V. V. Radzievskii, and Stephen J. Paddack
- Young diagram (a.k.a. Ferrers diagram), Young tableau – Alfred Young
- Young's modulus – Thomas Young
- Yule–Simpson effect (a.k.a. Simpson's paradox) – Edward H. Simpson and Udny Yule
Read more about this topic: Scientific Phenomena Named After People