Iota

Part of speech: noun (n.)

1. The ninth letter of the Greek alphabet (i) corresponding with the English i.

2. A very small quantity or degree; a jot; a particle. They never depart an iota from the authentic formulas of tyranny and usurpation. Burke. Iota subscript (Gr. Gram.), iota written beneath a preceding vowel, as a,, h,, w,, -- done when iota is silent.