external

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external

1. Politics of or involving foreign nations; foreign
2. of, relating to, or designating a medicine that is applied to the outside of the body
3. Anatomy situated on or near the outside of the body
4. Education denoting assessment by examiners who are not employed at the candidate's place of study
5. Austral and NZ (of a student) studying a university subject extramurally
6. Philosophy (of objects, etc.) taken to exist independently of a perceiving mind
7. Austral and NZ a student taking an extramural subject
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
In arteries, it is relatively thick and extends from the internal elastic membrane to the external elastic membrane. The external elastic membrane is a layer of elastin that separates the tunica media from the tunica adventitia.
Tuzcu pointed out that angiographic assessment of atherosclerotic lesions is based on an inherent assumption that the external elastic membrane area in the so-called reference segment is representative of the original vessel size at the lesion site.
The images provide a view once seen only at autopsy of the intima, the endothelium, the media, and the external elastic membrane where the adventitia begins.

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