n. Abnormal growth or development, especially as regards height.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. excessive largeness of stature
n. excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland
Word Usage
"You know that there is a disease called giantism, caused by ‘a certain morbid process in the sphenoid bone of the skull — viz., an excessive development of the anterior lobe of the pituitary body’ (this is from the nearest encyclopedia)."