S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
S: (n) part, portion, component part, component, constituent (something determined in relation to something that includes it) "he wanted to feel a part of something bigger than himself"; "I read a portion of the manuscript"; "the smaller component is hard to reach"; "the animal constituent of plankton"
S: (n) relation (an abstraction belonging to or characteristic of two entities or parts together)
S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
S: (n) drug of abuse, street drug (a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction)
S: (n) drug (a substance that is used as a medicine or narcotic)
S: (n) agent (a substance that exerts some force or effect)