memorium 

A sum of money or an item set up as a monument to the memory of a person or event.

Dear Ms. Jane Doe
Several sums of money were given in memory of your uncle Mr. John Doe. Each different memorium is listed in the letter to follow.

memorium by babdie 1 April 8, 2013

memoriam 

A person that has died.
Proper way to say in memory of

In memoriam of ...

(in professional setting)

memoriam by Brit Brat Carroll May 11, 2015

Memorimisticism 

A disease where the intense size of ones penis causes memory loss when erect.

Steve walked into the strip club and realized he was a victim of memorimisticism

Memorimisticism by SAMPSONSTEVE July 29, 2007