The second letter of the Greek alphabet (Β, β), preceded by alpha (Α, α) and followed by gamma, (Γ, γ). In modern Greek it represents the voiced labiodental fricative sound of v found in the English words have and vase.

(computing) To preliminarily release computer software for initial testing prior to final release. / (chiefly Internet) To beta-read a text.

Identifying a molecular position in an organic chemical compound. / Designates the second in an order of precedence.

plural of beta blocker

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

(biochemistry) Any amino acid that has the amino and carboxylic functional groups attached to adjacent carbon atoms; beta-alanine is the only one that occurs in nature, but not in peptides or proteins.

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

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

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

plural of beta-lactam