Definition of "hyperpituitarism" []

• Pathologically excessive production of anterior pituitary hormones, especially growth hormones. (noun)
• The condition resulting from an excess of pituitary hormones, characterized by gigantism in children and acromegaly in adults. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "When the anterior lobe is implicated and there is a pathological increase in the functional activity of the gland (_hyperpituitarism_), signs of acromegaly may ensue."