TETANIC • DICTIONARY ONE.COM • Definition of Tetanic

... always restore the sufferer, like an automatic safety-valve; thus a yawn, that is to say, a deep, spasmodic inspiration, which dilates the pulmonary alveoli, causes the blood to flow to the heart like a suction pump, and sets it in motion again. In anger there is a kind of tetanic contraction of all the capillaries, causing extreme pallor, and the expulsion of an extra quantity of bile from the liver. Pleasure causes dilatation of the blood-vessels; the circulation, and consequently all the functions of secretion and assimilation are facilitated; ...

— Spontaneous Activity in Education • Maria Montessori

... station electrics she beamed upon him, and he felt glad at heart, as if he had been saved from something, a mortal danger or a threatened shame. But he could not speak at once; his teeth closed with tetanic force upon each other. Later, as they walked to the hotel, through the warm, soft night in which the south wind was roaming the starless heavens for rain, he found his voice, and although he felt that he was speaking unnaturally, ...

— Between The Dark And The Daylight • William Dean Howells