| gyroidal | 1. Spiral in arrangement or action. 2. <chemistry> 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. <optics> Turning the plane of polarization circularly or spirally to the right or left. Origin: Gr. Circle + -al. Source: Websters Dictionary (01 Mar 1998) |
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