torus
solid torus
bicircular
covering space
antispace
Euclidean plane
subbase
metric function
metric
great circle
base
closed curve
topologize
compactum
isometric space
solid geometry
circuit
pointset
annulus
underlying set
lune
open set
biconic
wedge sum
Krein-Milman theorem
transversality
phase space
conoid
Miquel's theorem
second-countable
Tychonoff cube
cone shape
cone
neuromanifold
orbispace
Lindelöf space
equilogical
two-dimensional figure
collision detection
direct product
monogon
orbic
Thurston's geometrization conjecture
Polish space
plane figure
space-filling
squircular
dunce hat
semispace
circular segment