Vandervert (1980/1988) described in scientific detail a simple, every day illustration of an operational definition in terms of making a cake (i.e., its recipe is an operational definition used in a specialized laboratory known as the household kitchen).andervert (1980/1988) described in scientific detail a simple, every day illustration of an operational definition in terms of making a cake (i.e., its recipe is an operational definition used in a specialized laboratory known as the household kitchen).
In addition, a swollen tongue can be caused by: 1  Hormonal disorders such as acromegaly. 2  Congenital disorders such as Beckwith Wiedemann syndrome. 3  Genetic disorders such as Down syndrome and hereditary angioedema. 4  Hypothyroidism, an underactive thyroid. 5  Poor vitamin B12 absorption. 6  Pituitary gland disorder.
An injury from hot food or liquid that burns the tongue or simply biting the tongue can irritate the tongue to cause swelling. Conditions such as oral thrush or oral herpes viruses can cause the tongue to swell due to inflammation. Other medical conditions include tumorous cancer, acromegaly (giantism), amyloidosis, sarcoidosis, hypothyroidism, and Kawasaki disease. Tongue swelling can also be found in individuals with Down syndrome.