merohedral

merohedral

[¦mer·ə¦hē·drəl]
(crystallography)
Of a crystal class in a system, having a general form with only one-half, one-fourth, or one-eighth the number of equivalent faces of the corresponding form in the holohedral class of the same system. Also known as merosymmetric.
References in periodicals archive ?
An extreme case is a merohedral twin for which S = 1 in which the lattice is continuous through the twin boundary.
Twinning: merohedral. X-ray powder diffraction data: 11.348 (44.2) (101), 6.021 (36.1) (021), 4.291 (36.5) (205), 3.389 (42.9) (141), 3.150 (34.9) (237), 2.964 (100.0) (345), 2.844 (89.1) (404).