different between gyroidal vs gyroid

English

Ancient Greek

gyroidal (not comparable)

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.

gyro- +? -oid

gyroid (plural gyroids)

(mathematics) An infinitely connected periodic minimal surface containing no straight lines.

gyroid (not comparable)

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