Name of a descriptive text field?
A description describes an object like a product. 


  Description: 5x10" widget used for squiggle placement.


A remark is often printed on invoices/statements/payments to show to the customer or supplier. 


  Remark: This payment relates to invoices #1, #2, and #4.


A note calls out attention to something out of the ordinary or seperate to everything else. It may be internal-only.


  Note: Do not sell any more widgets to this customer because they have an outstanding invoice.


These aren't hard and fast rules but it's where I've seen them used.