Initial /(?)/

1. Of or pertaining to the beginning; marking the commencement; incipient; commencing; as, the initial symptoms of a disease.
2. Placed at the beginning; standing at the head, as of a list or series; as, the initial letters of a name.

1. The first letter of a word or a name.

imp. & p. p. Initialed; p. pr. & vb. n. Initialing

1. To put an initial to; to mark with an initial of initials. [R.]