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Of or relating to the mesomorphic phase of a liquid crystal in which molecules are closely aligned in a distinct series of layers, with the axes of the molecules lying perpendicular to the plane of the layers.

[From Greek smēktos, smeared, from smēkhein, to wash off.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Chemistry) chem (of a substance) existing in or having a mesomorphic state in which the molecules are oriented in layers. Compare nematic See also liquid crystal
[C17: via Latin from Greek smēktikos, from smēkhein to wash; from the soaplike consistency of a smectic substance]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈsmɛk tɪk)

(of liquid crystals) noting a mesomorphic state in which the arrangement of the molecules is in layers. Compare nematic.
[1920–25; < French smectique (1922) < Latin smēcticus cleansing]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
de Paris VII) describe theoretical and experimental studies in smectic and columnar liquid crystals for advanced students and researchers, covering such topics as structure of the smectic A phase and the transition toward the nematic phase, the continuum theory of smectics A hydrodynamics, dislocations, focal conics, rheology, ferroelectric and antiferroelectric mesophases, twist-grain boundary smectics, hexatic smectics and the smectic B plastic crystal, smectic free films, columnar phases, and growth of a columnar hexagonal phase.
Smectic and columnar liquid crystals; concepts and physical properties illustrated by experiments.
Saivada, "Ionic conduction in nematic and smectic a liquid crystals," Molecular Crystals and Liquid Crystals, vol.