acromegaly

n. (Pathology) abnormal condition causing enlargement of the bones (in the hands, feet and head)

Acromegaly (from Greek akros "extreme" or "extremities" and megalos "large" - extremities enlargement) is a hormonal disorder that results when the pituitary gland produces excess growth hormone (hGH). Most commonly it begins when a GH producing tumor derived from a distinct type of cells (somatotrophs) and called pituitary adenoma.
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Acromegaly /ac·ro·meg·a·ly/ abnormal enlargement of limbs, caused by hypersecretion of growth hormone after maturity. ac·ro·meg·a·ly n. [more]Acromegaly - Community and Resources

Noun
1. enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor)
(synonym) acromegalia
(hypernym) hypertrophy
(part-meronym) hyperpituitarism

(n.)
Chronic enlargement of the extremities and face.