Symbiote

The term symbiote is a misnomer (wrong name) for the Goa'uld it refers to on the Stargate movie and series. In biology a symbiote is an organism that lives with or off another organism receiving and giving benefits. While some may argue that the term applies to the Goa'uld because they sustain the organism they live in for an unusually long time and provide physical healing, they are really parasites which feed off of another being without providing true benefits.

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Goa'uld:Biology