Definition of Alveolar

Alveolar: Pertaining to the alveoli, the tiny air sacs in the lungs. The exchange of oxygen and carbon dioxide takes place in the alveoli which look like cells in a honeycomb.
The word comes from the Latin diminutive of "alveus" meaning a cavity or hollow = a little cavity or hollow.

Definition of Acromion

Acromion: The projection of the scapula (the shoulder blade) that forms the point of the shoulder.
The acromion is part of the scapula. It protrudes laterally (away from the midline) and is triangular in shape.
The top of the shoulder is acromial. The word "acromion" comes from the Greek "akron", peak + "omos", shoulder = the peak of the shoulder.

Definition of Ablation

Ablation:
Removal or excision. Ablation is usually
carried out surgically. For example, surgical removal of the thyroid
gland (a total
thyroidectomy) is ablation of the thyroid. The word ablation comes
from the Latin ablatum
meaning to carry away.
Historically, the word ablation once
had mainly a general meaning so that in 1671 the ablation (removal)
of a disease was a matter for
consideration. But by 1846 "ablation" had taken on a specifically
surgical edge and today it applies principally to the surgical
removal of any part of
the body.

Definition of Abdomen

Abdomen: The belly, that part of the body
that contains all of the structures between the chest and
the pelvis. The abdomen is separated anatomically from the chest
by the diaphragm, the powerful muscle spanning the body cavity below the lungs.
The abdomen includes a host of organs including the stomach, small intestine, colon, rectum, liver, spleen, pancreas, kidneys, appendix,
gallbladder, and bladder.
The word "abdomen" has a curious story behind it. It comes
from the Latin "abdodere", to hide. The idea was that whatever was
eaten was hidden in the abdomen.