(Britain, nonstandard) plural of ha'p'orth

The sum of the mass concentrations of five haloacetic acids regulated by the USEPA (mono-, di- and trichloroacetic acid and mono- and dibromoacetic acid)

A theorem stating that the interaction picture does not exist in an interacting, relativistic quantum field theory.

(UK, chiefly derogatory) Very cheap.

plural of ha'penny

plural of ha'porth

(Britain) A game, traditionally played in pubs in Great Britain, in which players attempt to push coins so that they land between marked boundaries.

(UK, idiomatic, dated, in negative constructions) Any money whatsoever.

A surname.