Sciatherically

Meaning: of or like a sun-dial, or other instrument that cast shadows; in 1677 one could practice sciatherics, or the Art of Dialling.

Usefulness: 2 (it's rather adaptable: it could apply to speed - he moves sciatherically - or motion - progress has been sciatherical - or antiquity - my phone is sciatherically out of date)

Logofascination: 1 (for sheer obscurity)