mesomorphic phase

Also contains definition of: nematic state
Often formed by concentrated systems of @S06194@. These are states of matter in which @I03298@ molecules (or particles) are regularly arranged in one (nematic state) or two (@S05714@) directions, but randomly arranged in the remaining direction(s).
PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 613 [Terms] [Paper]