(physics) An energetic electron or positron produced as the result of a nuclear reaction or nuclear decay.

(computing) An early version of a program or application that contains most of the major features, but is not yet complete. Sometimes these versions are released only to a select group of people, or to the general public, for testing and feedback. This is the second major stage of development following the alpha version, and comes before the release candidate.

(pharmacology) A blocking agent, one of a class of drugs used to treat hypertension and control the rate at which the heart beats.

A radioactive substance emitting beta particles.

(neurology) An electrical signal produced by the brain while the subject mentally active.

(organic chemistry) A lactam having a four-membered ring structure; a structural element of many antibiotics such as penicillin.

The optical illusion whereby a series of static images shown in rapid succession on a screen appear to show a smoothly animated scene.

plural of beta orbiter

plural of beta-lipoprotein

plural of beta globin