Scrupulum, meaning a tiny stone (from scrupus sharp stone), indicates a weight of 1/24 of an ounce or, by extension, of other measures. Metaphorically, the stone is thought to be sharp and pricking, like a thorn.
- As a weight or a coin, 1/24 of an uncia, or 1/288 of an as
- As a measure of land, 1/288 of a jugerum
- As a measure of time, 1/24 part of an hour, or 2.5 minutes.
The forms scripulum, scriptulum, scriplus and scriptulus can be found, scriptulum being also associated with the lines on a draughtboard.
Félix Gaffiot: Dictionnaire Illustré Latin Français, Hachette 1934
- CIC. Att. 4, 16, 13; VITR. 7, 8; COL. 12, 28, 1.
- VARR. R. 1, 10, 2; COL. 5, 1, 8
- M. AUREL. d.; FRONT. Caes. 2, 9