(ecology) Interaction between two organisms, in which one organism (the parasite) benefits and the other (the host) is harmed. / (figuratively) A similar interaction between people.

(electronics) A component of a circuit that does not show up in a circuit's schematic but does show up in the circuit's behavior.

Of or pertaining to a biological or symbolic parasite. / Drawing upon another organism for sustenance. / Exploiting another for personal gain.

(derogatory) A person who lives on other people's efforts or expense and gives little or nothing back. / (derogatory) A sycophant or hanger-on.

to live on or in a host organism as a parasite

plural of parasite

(nonstandard) parasitization

plural of parasitation

plural of parasitizer

One who parasitizes.