Zorkmid

A Zorkmid is a single unit of currency. It is also the base unit for measuring the weight of objects.

"Gold piece" and "Zorkmid" are used interchangably throughout NetHack. For example, when you pick up money lying on the floor, you receive the message, "# gold piece(s)", but when you pick up an item in a shop, you receive the message, "x- an [item] (unpaid, # zorkmids)".

Zorkmids are a special type of object: they take up an inventory slot and have weight, but have no BUC status. Their symbol is $, although this should not be taken to mean the zorkmid exchange rate is pegged to the US dollar. The abbreviations zm, zk are sometimes appended to a number as a currency symbol.

The name "Zorkmid" originates from the Zork series of text adventures; see Zorkmid on Wikipedia.