Sicca \Sic"ca\, n. [Ar. sikka.]

A seal; a coining die; -- used adjectively to designate the silver currency of the Mogul emperors, or the Indian rupee of 192 grains.

Sicca rupee, an East Indian coin, valued nominally at about two shillings sterling, or fifty cents.

Source: Webster's Revised Unabridged Dictionary (1913)