ascender

noun

1. A person or thing that ascends.
2. The portion of a lowercase letter that extends above the midline.

   “Catherine had a paperback called Graphology: The Mind in the Hand, which gave her all sorts of warnings about people’s tendencies and repressions (“Artist or Madman?” “Pet or Brute?”). “It's those enormous ascenders, darling,” she said: “I see a lot of ego.””

3. (uncommon)A lowercase letter that has such a portion, such as d or h.
4. a mechanical device used for ascending on a rope; ascendeur.