1160
Unit cells represent the building blocks of a lattice , which is generated either from sweeping , meshing/mapping , tessellation to obtain a regular pattern or stochastically yielding unstructured formations , which is often achieved via techniques such as dithering .
 concept or principle: Unit cells; concept or principle: lattice; engineering feature: tessellation; concept or principle: pattern; material: as
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: Unit cells; concept or principle: lattice; engineering feature: tessellation; concept or principle: pattern; material: as