blotter

noun

1. 1

   A piece of blotting paper in a pad as a piece of desk furniture

2. 2

   (law enforcement) a daily register of arrests and other events in a police station

3. 3

   A register of the related events made in the form of the list of times and brief descriptions

   “All transactions were entered in the cash blotter and agent's subsidiary ledger.”

4. 4

   A portion of blotter acid.