Dictionary entry

Memento

Webster's Dictionary 1913

Me‐men″to (?), n.; pl.Mementos (#). [L., remember, be mindful, imper. of meminisse to remember. See Mention.] A hint, suggestion, token, or memorial, to awaken memory; that which reminds or recalls to memory; a souvenir.

Seasonable mementos may be useful. Bacon.