Latin, meaning: outer, foreign, outside, external. 
Synonym for external ... <anatomy> Situated or occurring on the outside, many anatomical structures formerly called external are now more correctly termed lateral. ... Origin: L. Externus = outside ... (18 Nov 1997) ... 
(ek-stur´nәs) external; in anatomy, denoting a structure farther from the center of an organ or cavity.
Type: Term Pronunciation: eks-ter′nŭs Synonyms: external
outer, foreign, outside, external.