Ex‐trin″sic (?), a. [L. extrinsecus; exter on the outside + secus otherwise, beside; akin to E. second: cf. F. extrinsèque. See Exterior, Second.] 1. Not contained in or belonging to a body; external; outward; unessential; — opposed to intrinsic.
The extrinsic aids of education and of artificial culture. I. Taylor.
2. (Anat.) Attached partly to an organ or limb and partly to some other part; — said of certain groups of muscles. Opposed to intrinsic.