solid-state

Short definition from Wiktionary

Adjective

1. 1
   Having or relating to the physical properties of solid materials, especially electromagnetic, thermodynamic or structural properties of crystalline solids.
2. 2
   Based upon semiconductors, as distinct from older technologies such as vacuum tubes.
3. 3
   Using all solid construction; not using a wet membrane, gel, paste, liquid, gas or air, as the electrolyte or electrodes.
4. 4
   Alternative form of solid-state.