(medicine) inflammation of the gums

(clocks, mechanics) The contrivance in a timepiece (winding wristwatch) which connects the train of wheel work with the pendulum or balance, giving to the latter the impulse by which it is kept in ...

Not shaped.

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.