The councilors call Barnavelt an impudent liar and introduce several letters further attesting to guilt.

He did introduce the notation of capital and lowercase letters for dominant and recessive alleles, respectively, still in use today.

"We introduce letters simultaneously through hearing, seeing and feeling," Mrs. Rose said.

By introducing recent letters from Mr. Malvo to a fellow inmate, prosecutors seemed to suggest that he remained a threat.

Alphabet books introduce the sounds and letters of the ordered alphabet.

Mario introduced damaging letters Marco had written to him about how Viki had threatened him.

Plucking a pencil from the desk, The Shadow introduced letters of his own, copying the exact style of the others.

In particular, the Greeks introduced regular letters for vowels, which was necessary for their language.

Elementary algebra builds on and extends arithmetic by introducing letters called variables to represent general (non-specified) numbers.

The Mizos never had a written script until the missionaries introduced Roman letters.