In context|crystallography|lang=en terms the difference between gyroidal and gyroid
is that gyroidal is (crystallography) having the planes arranged spirally, so that they all incline to the right (or left) of a vertical line; said of certain hemihedral forms while gyroid is (crystallography) gyroidal.
As adjectives the difference between gyroidal and gyroid
is that gyroidal is spiral in arrangement or action while gyroid is (crystallography) gyroidal.
As a noun gyroid is
(mathematics) an infinitely connected periodic minimal surface containing no straight lines.
gyroidal
English
Adjective
(
-)
Spiral in arrangement or action.
(crystallography) Having the planes arranged spirally, so that they all incline to the right (or left) of a vertical line; said of certain hemihedral forms.
Turning the plane of polarization circularly or spirally to the right or left.
(
Webster 1913)
gyroid
English
Noun
(
wikipedia gyroid)
(
en noun)
(mathematics) An infinitely connected periodic minimal surface containing no straight lines
Adjective
(-)
(crystallography) gyroidal