[ik-strin-sik, -zik] /ɪkˈstrɪn sɪk, -zɪk/
not essential or inherent; not a basic part or quality; extraneous:
facts that are extrinsic to the matter under discussion.
being outside a thing; outward or external; operating or coming from without:
Anatomy. (of certain muscles, nerves, etc.) originating outside the anatomical limits of a part.
not contained or included within; extraneous
originating or acting from outside; external
1540s, from French extrinsèque, from Late Latin extrinsecus (adj.), from Latin extrinsecus (adv.) “outwardly,” from exter “outside” + in, suffix of locality, + secus “beside, alongside,” originally “following” (related to sequi “to follow;” see sequel).
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.
noun, Anatomy. 1. any of six small muscles that control the horizontal, vertical, and rotating movements of the eyeball.
noun, Biochemistry. 1. . extrinsic factor n. See vitamin B12.
- Extrinsic incubation period
extrinsic incubation period n. The interval between the acquisition of an infectious agent by a vector and the vector’s ability to transmit the agent to other susceptible vertebrate hosts.
- Extrinsic sphincter
extrinsic sphincter n. A sphincter formed by circular muscular fibers extraneous to the organ.