i Register
In some senses, nummular is marked as obsolete, rare. Watch for register when choosing this word.
adj
Of or relating to coins or money.
Flattened with a rounded form, as a disc; coin-shaped.
Flattened with a rounded form, as a disc; coin-shaped.
NUMMULAR […] An epithet applied to the sputa in phthisis, when they flatten at the bottom of the vessel, like a piece of money.