-i-

A vowel inserted interconsonantally between morphemes of Latinate origin in order to ease pronunciation (an anaptyxis, a linking vowel).

A monoclonal antibody derived from a non-human primate source.

A spelling variant of a word-final -y vowel when followed by a suffix that does not begin with an i, for example -ied, -ier, -iest.

In compound words, a spelling variant of a final or suffixed -y vowel in the first word.