The Cherenkov effect A charged particle traveling in a dielectric medium with n>1 radiates Cherenkov radiation if its velocity is larger than the phase velocity of light v>c/n or Î² > 1/n (threshold) The emission is due to an asymmetric polarization of the medium in front and at the rear of the particle, giving rise to a varying electric dipole momentum.
cyclo-. 1. Combining forms relating to a circle or cycle; or denoting an association with the ciliary body. 2. In chemistry, a combining form indicating a continuous molecule, without end, or the formation of such a structure between two parts of a molecule.
Cyclosporine is a drug that decreases the action of the bodyâs immune system. It is used frequently in organ or bone marrow transplant patients to prevent rejection. It also is used to treat diseases caused by an overactive immune system, such as in patients with Crohnâs diseas e or rheumatoid arthritis.