I'm trying to express 'clockwise' and 'anti-clockwise' in Latin, for which there are not likely to be classical precedents.
Other languages generally seem to lack such brief and simple expressions : in German and French, for example, it's necessary to employ phrases using the movement of a clock's hands, which in comparison with the English feel long and clumsy. In Russian it's a little neater, по часовой стрелке 'arrow of time', comparable with modo solarii, 'in the same way as the sundial'.
I suppose modo solarii works after a fashion, but it's somehow unsatisfying. Can anyone suggest something better?