What does "purtenance" mean?

Purtenance: That which pertains or belongs to something; esp., the heard, liver, and lungs of an animal. [Obs.] " The purtenaunces of purgatory." Piers Plowman. Roast [it] with fire, his head with his legs, and with the purtenance [Rev. Ver., inwards] thereof. Ex. xii. 9.

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