|a cord or band of dense, tough, inelastic, white, fibrous tissue, serving to connect a muscle with a bone or part; sinew|
|belonging to or lying within a given part of certain muscles or nerves|
|1.||not contained or included within; extraneous|
|2.||originating or acting from outside; external|
|[C16: from Late Latin extrinsecus (adj) outward, from Latin (adv) from without, on the outward side, from exter outward + secus alongside, related to sequī to follow]|
extrinsic ex·trin·sic (ĭk-strĭn'sĭk, -zĭk)
Of or relating to an organ or a structure, especially a muscle, originating outside of the part where it is found or upon which it acts; adventitious.