smectic
adjective
smec·tic ˈsmek-tik 
: of, relating to, or being the phase of a liquid crystal characterized by arrangement of molecules in layers with the long molecular axes in a given layer being parallel to one another and those of other layers and perpendicular or slightly inclined to the plane of the layer compare cholesteric, nematic
Example Sentences
Recent Examples on the Web With the smectic liquid crystals used in this new smart glass, an electrical voltage has a different result. 
David Grossman, Popular Mechanics, 9 June 2016
David Grossman, Popular Mechanics, 9 June 2016 Word History
Etymology
Latin smecticus cleansing, having the properties of soap, from Greek smēktikos, from smēchein to clean
First Known Use
1923, in the meaning defined above
Medical Definition
smectic 1 of 2
adjective
smec·tic ˈsmek-tik
: of, relating to, or being the phase of a liquid crystal characterized by the arrangement of the molecules in layers with the long axes of the molecules in a given layer being parallel to one another and perpendicular to the plane of the layer
a smectic phase of cholesterol esters in denatured LDL
compare mesomorphic sense 1, nematic smectic
2 of 2noun
: a liquid crystal in its smectic phase