An animal's viscera or internal organs, especially the heart, liver, and lungs.
The viscera of an animal.
(obsolete) That which pertains or belongs to something.
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
Origin of purtenance
Middle English pertenaunce, purtenaunce adjunct from Old French partenance, pertinence from partenir to pertain pertain