vocalism (iou) and diphtheria (iou)

vocalism (iou)

vocalism noun. M19.
[from VOCAL adjective + -ISM.]
The use of the voice or vocal organs in speech or singing. M19.
a. A system of vowels; the use of vowels. M19.
b. A vocal sound or articulation. L19.

diphtheria (iou)

diphtheria noun. M19.
[mod. Latin, from French diphtherie, substituted by P. Bretonneau for his earlier diphtherite: see DIPHTHERITIS, -IA1.]
An acute contagious bacterial disease characterized by the inflammation of a mucous membrane, esp. in the throat, the formation of a false membrane, and the production of potentially fatal toxins affecting the heart and nerves.
diphtherial,
diphtherian (now rare),
diphtheric adjectives L19.

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