In memoriam why not in memoria?

1. Is it Memoriam or memoria?
2. Why is it in memoriam and not in memoria?
3. What is the difference between in memoriam and in memory?
4. What is the correct use of in memoriam?

Is it Memoriam or memoria?

In memoriam is a Latin phrase meaning “in memory of” or “as a memorial to.” It's typically used in memorials to those who have died. In memoriam is a common epitaph—the inscription on a gravestone or other monument. It's also commonly used as a heading in obituaries.

Why is it in memoriam and not in memoria?

The first is the phrase "in memoriam", frequently misspelled "in memorium". It is a Latin phrase, and the Latin word for "memory" is the feminine memoria. If you misspell this, just think of the word "memorial". The second is "memento", frequently misspelled "momento".

What is the difference between in memoriam and in memory?

In memoriam is a Latin phrase equivalent to "in memory (of)", referring to remembering or honouring a deceased person.

What is the correct use of in memoriam?

Sometimes followed by a reference to the one being remembered: then, either a preposition is used (typically of) or in memoriam is followed directly by the reference (as in in memoriam: Christa McAuliffe or in memoriam Christa McAuliffe).