Money (pecunia) is so called from cattle (pecus), because the wealth of our ancestors consisted in cattle.

Explanation

This etymological maxim reminds us that “money” in law is not limited to coined currency — historically and legally, any medium of exchange recognized by the community may serve as money.

Where this applies

• A dispute arises about what constitutes legal tender.
• Someone refuses payment in a particular form and the question is whether it counts as money.