Arteriosclerosis refers to a stiffening of arteries.

Arteriosclerosis is a general term describing any hardening (and loss of elasticity) of medium or large arteries (from the Greek arterio, meaning artery, and sclerosis, meaning hardening)

It should not be confused with "arteriolosclerosis

Arteriolosclerosis

Arteriolosclerosis is a form of cardiovascular disease affecting the small arteries and arterioles.Types include hyaline arteriolosclerosis and hyperplastic arteriolosclerosis, both associated with vessel wall thickening and luminal narrowing that may cause downstream ischemic injury...

" or "atherosclerosis

Atherosclerosis

Atherosclerosis is a condition in which an artery wall thickens as a result of the accumulation of fatty materials such as cholesterol...

".

Also known by the name "myoconditis" which is outdated and no longer in general use.

Types

• Arteriosclerosis obliterans
  Arteriosclerosis obliterans
  Arteriosclerosis obliterans is an occlusive arterial disease most prominently affecting the abdominal aorta and the small- and medium-sized arteries of the lower extremities, which may lead to absent dorsalis pedis, posterior tibial, and/or popliteal artery pulses.It is characterized by fibrosis of...
  
   is typically seen in medium and large arteries of the lower extremity. Characterized by fibrosis of the intima and calcification of the media. The lumen of the vessel may be obliterated or markedly narrowed.
• Medial calcific sclerosis (Monckeberg’s calcific sclerosis) is seen mostly in the elderly, commonly in arteries of the thyroid and uterus. Characterized by calcification of the internal elastic lamina
  Internal elastic lamina
  The internal elastic lamina or internal elastic lamella is a layer of elastic tissue that forms the outermost part of the tunica intima of blood vessels. It readily visualized with light microscropy in sections of muscular arteries, where it is thick and prominent, and arterioles, where it is...
  
  but without thickening of the intima or narrowing of the vessel lumen. A similar form of an intramural calcification, presenting the picture of an early phase of arteriosclerosis, appears to be induced by a number of drugs that have an antiproliferative mechanism of action.