(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.

(publishing) A person who informally proofreads another person's text before the latter makes it available to the general public.

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

plural of beta blocker

(physics) A nuclear reaction in which a beta particle (electron or positron) is emitted.

(biochemistry) Any artificial peptide made from beta-amino acids; used in some antibiotics in an attempt to counter resistance.

Something that is in its beta stage, or being tested.

plural of beta-peptide