In four identical copies.
More example sentences
- All experiments were performed in quadruplicate, using skin samples from four different pigs.
- Yet more than 13 months after the fact, Adams repeated the lie; dishonesty in quadruplicate.
- You fill in this form in quadruplicate, wait six months, and we'll consider restoring your lilywhite status to you.
Definition of in quadruplicate in:
- The US English dictionary