An improvement. / (law) An improvement to a property that adds to its value.

(idiomatic) In a difficult and inescapable position. / (idiomatic) Having the choice between two unpleasant or distasteful options; in a predicament or quandary.

(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.

A holy place. / A chapel, especially one for sailors, converted from an old ship.

An ancient town in Palestine, generally identified with modern Beitin in the West Bank; the site of Abraham's first altar. / The largest city in western Alaska.

(game theory, of a strategy) That leads to a better outcome no matter what the other player does.

Lying between; neither one thing nor the other.

An interval or intervening time. / One who intervenes.