Scruple (unit)

The scruple (℈) is a small unit in the apothecaries' system, derived from the old Roman scrupulum (lit. 'small pebble') unit (scrupulus/scrupulum).

Mass unit
The scruple is $1/undefined$ ounce, $1/undefined$ dram, or 20 grains. It is therefore equal to 1.2959782 grams. The Roman scruple was somewhat smaller, around 1.14 g.

Volume unit
The fluid scruple is $1/undefined$ fluid ounce, $1/undefined$ fluid dram, 20 minims, or $1/undefined$ teaspoon, or 1 saltspoon. It is therefore equal to 1.2323 milliliters in US customary system.

in imperial customary system equal 1,1839 ml.