砥石(といし)とは?【建築用語・土木用語・大工用語】 砥石(といし)とは、刃物や石材などを研いだり磨いたりするための道具のことをいいます。 Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window