A habitational surname from Old English from several places of that name in England. / A surname from Irish anglicised from the Irish Ó hArrachtáin "descendant of Arrachtán".

A short, light jacket with a zip front and often a tartan lining.

plural of Harrington

plural of harringtonine

(organic chemistry) Any of a class of alkaloids that inhibit protein synthesis, obtained from conifers of the genus Cephalotaxus.

The lower limit on the Q factor for a small radio antenna.

A suburban area of the borough of Haringey, in northern London, England (note the different spellings).

A surname.

plural of Harring

(mathematical logic) A theorem stating that a certain combinatorial principle in Ramsey theory, namely the strengthened finite Ramsey theorem, is true, but not provable in Peano arithmetic.