• (a.) Spiral in arrangement or action. • (a.) Turning the plane of polarization circularly or spirally to the right or left. • (a.) Having the planes arranged spirally, so that they incline all to the right (or left) of a vertical line; -- said of certain hemihedral forms. Found on http://thinkexist.com/dictionary/meaning/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: Webster... Found on http://www.encyclo.co.uk/local/20973
Gy·roid'al (ji*roid' a l) adjective [ Greek 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 cer... Found on http://www.encyclo.co.uk/webster/G/71