Akinesia is the term neurologists and other medical professionals use for absence of movement. Two related terms often used in conjunction with akinesia are bradykinesia(slowed movement) and hypokinesia (reduced movement).
Aplasia is the medical term meaning absence of development.
Asplenia is the medical term meaning absence of the spleen.
Anhydrosis or anhidrosis, either spelling, is the medical term meaning an abnormal condition of an absence of sweat or perspiration.
Athelia is the medical term meaning absence of nipples.
Aphakia is the medical term meaning absence of the lens. This is often a result of cataract surgery.
The word sedentary is often used when discussing a general lack of physical activity.
Aplasia is the medical term meaning absence of development.
Athelia means absence of a nipple.
arrhythmia
The medical term for absence of the external ear is "anotia." This condition involves complete absence of the external ear.
anhydrous
Anencephaly.