configuration
set of geometric points and lines such that each point is incident to the same number of lines and each line is incident to the same number of points
Moore neighborhood
in cellular automata
syzygy
straight-line configuration of three celestial bodies in astronomy
Desargues configuration
geometric configuration of ten points and lines
Galilean cannon
type of device that demonstrates conservation of linear momentum
Perles configuration
irrational system of points and lines
Lute of Pythagoras
self-similar geometric figure
root system
geometric arrangements of points, foundational to Lie theory
Hesse configuration
geometric configuration of 9 points and 12 lines
meander
self-avoiding closed curve which intersects a line a number of times
complete quadrilateral
four lines that determine six distinct points
Pappus configuration
configuration of 3 lines and 9 points of the Euclidean plane that appears in Pappus's hexagon theorem