This is the 12763rd most frequent Russian word.
крестик
"Крестик" means "little cross" or "small cross" in English.
Here, 'крестик' refers to a type of embroidery where small crosses form patterns.
Я вышиваю крестиком ромашки на салфетке.
I am embroidering daisies with crosses on a napkin.
In this sentence, 'крестик' denotes a small cross used as a marker or symbol.
На карте отмечен крестиком наш дом.
A cross marks our house on the map.
Here, 'крестики' refers to the X symbols used in the game of tic-tac-toe.