What is a cistern in the course, or the termination, of a drain, to collect sedimentary or superfluous matter; a privy vault; any receptace of filth. [Written also sesspool.] called?

cesspool — A cistern in the course, or the termination, of a drain, to collect sedimentary or superfluous matter; a privy vault; any receptace of filth. [Written also sesspool.]. (Webster's 1913.)