mementos

noun, plural me·men·tos, me·men·toes.

1. an object or item that serves to remind one of a person, past event, etc.; keepsake; souvenir.
2. anything serving as a reminder or warning.
3. (initial capital letter, italics) Roman Catholic Church. either of two prayers in the canon of the Mass, one for persons living and the other for persons dead.

noun plural -tos or -toes

1. something that reminds one of past events; souvenir
2. RC Church either of two prayers occurring during the Mass

n.c.1400, “Psalm cxxxi in the Canon of the Mass” (which begins with the Latin word Memento and in which the dead are commemorated), from Latin memento “remember,” imperative of meminisse “to remember, recollect, think of, bear in mind,” a reduplicated form, related to mens “mind” (see mind (n.)). Meaning “reminder, object serving as a warning” is from 1580s; sense of “keepsake” is first recorded 1768.