Extrinsic \Ex*trin"sic\, a. [L. extrinsecus; exter on the outside + secus otherwise, beside; akin to E. second: cf. F. extrins[`e]que. 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.

Source: Webster's Revised Unabridged Dictionary (1913)