spaceship

avaruusalus A vehicle that flies through space.
puhekieltä A finite pattern that reappears after a certain number of generations in the same orientation but in a different position.
2002, Richard Nowakowski, More Games of No Chance (page 433)

We describe software that searches for spaceships in Conway's Game of Life and related two-dimensional cellular automata.

Synthesis of spaceship flotillas is even more complicated than synthesis of oscillators, since spaceships are like oscillators that move(..)

If we reverse the positions of $a and $b, the spaceship will sort in the opposite order(..)