Home › Forums › setting the stage › solids as quantum systems › Definition of solid This topic has 0 replies, 1 voice, and was last updated 1 year, 2 months ago by Israel. Viewing 1 post (of 1 total) Author Posts October 8, 2023 at 3:28 am #9377 IsraelParticipant A substance with a rigid or compact molecular structure Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In