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What is "gyroidal"

The Collaborative International Dictionary
Gyroidal

Gyroidal \Gy*roid"al\ (j[-i]*roid"al), a. [Gr. gy^ros circle + -oid + -al.]

  1. Spiral in arrangement or action.

  2. (Crystallog.) Having the planes arranged spirally, so that they incline all to the right (or left) of a vertical line; -- said of certain hemihedral forms.

  3. (Opt.) Turning the plane of polarization circularly or spirally to the right or left.

Wiktionary
gyroidal

a. 1 spiral in arrangement or action. 2 (context crystallography English) Having the planes arranged spirally, so that they all incline to the right (or left) of a vertical line; said of certain hemihedral forms. 3 Turning the plane of polarization circularly or spirally to the right or left.

Usage examples of "gyroidal".

Fact: Of the thirty-two possible crystal classes, only onethe gyroidal isometrichad, until recently, never been found in the mineral world.