Arachibutyrophobia

Today in Fluid Mechanics, I learned that other people also mistake my professor in his words. My professor was discussing modeling, specifically verifying the similitude of prototype and the model, when he brought up the Cauchy Number, which is unimportant to my entry so unexplained it shall remain. Now, anyone in their right mind would clearly hear the word "Cauchy", but Sara, because of her nut allergy, i suppose though it's not wholly clear, hears "Cashew". So I'm not sure of the meaning behind a cashew number, but she too is now on the terror watch list.