Hey you! Yes, you! Thank you for adding beauty to the world!
Definitions of Seu:
name: A surname (very rare: popularity rank in the U.S.: #45471)
noun: Initialism of slightly-enriched uranium. [(nuclear physics) Enriched uranium with 0.9-2% uranium-235, requiring a special moderator with very low neutron absorption (such as heavy water or high-purity graphite) in order to be able to sustain a nuclear fission chain reaction. Used to increase power output and efficiency in a few types of nuclear reactors capable of running on natural uranium, and for downblending of highly-enriched uranium from decommissioned nuclear weapons into low-enriched uranium suitable for use in commercial power reactors.]
noun: (computing) Initialism of single-event upset (a transient soft error/glitch caused by ionizing radiation impacting a chip).