columnar phase

https://doi.org/10.1351/goldbook.13804
Cylindrical assembly of molecules within a distinct series of layers in which the axes of the molecules lie in the planes of the layers and are identically aligned and oriented in adjacent layers.
Note: A columnar assembly of discotic molecules, called a columnar mesophase, a columnar discotic mesophase, or a columnar discotic, is one of the class of liquid crystal mesophases.
Source:
PAC, 2012, 85, 463. (Terminology for aggregation and self-assembly in polymer science (IUPAC Recommendations 2013)) on page 467 [Terms] [Paper]