quasicrystal \ˈ ̷ ̷ (ˌ) ̷ ̷ ˌ ̷ ̷ ̷ ̷ \noun Etymology:quasi (II) + crystal (I) : a body of solid material that resembles a crystal in being composed of repeating structural units but that incorporates two or more unit cells into a quasiperiodic structure • quasicrystallineadjective