The mesoscopic concept in continuum mechanics consists of extending the dom
ain of the balance equations by the set of mesoscopic variables and of intr
oducing a local distribution function of these variables as a statistical e
lement. The mesoscopic balance equations defined on this extended domain ar
e considered. The liquid crystals theory of uniaxial molecules represents o
ne example of mesoscopic continuum mechanics. (C) 2000 Elsevier Science B.V
. All rights reserved.