cycloid |
circleinvolute |
Circleinvolute is likely misspelled.
Circleinvolute has no English definition.
As a noun cycloid
is the locus of a point on the circumference of a circle that rolls without slipping on a fixed straight line.
As an adjective cycloid
is resembling a circle; cycloidal.
circleinvolute |
helicoid |
As an adjective helicoid is
having the form of a flattened helix.
As a noun helicoid is
(mathematics) a minimal surface in the form of a flattened helix.