solid state

from WordNet (r) 3.0 (2006)

solid state
    n 1: the state in which a substance has no tendency to flow
         under moderate stress; resists forces (such as compression)
         that tend to deform it; and retains a definite size and
         shape [syn: {solid}, {solidness}, {solid state}]

from The Free On-line Dictionary of Computing (8 July 2008)

solid state

   <electronics> (Often hyphenated when used as an adjective) A
   term describing any device that uses {semiconductor}
   components rather than {electron tubes} or {relays}.
   Semiconductors are "solid" in that they contain no gas
   ("vacuum" tubes contain a small amount as the vacuum is not
   perfect) or moving parts (like relays), but probably more
   important is the connotation of reliability and durability
   that made possible things like portable radios.

   (2007-09-21)