Terminal" src="http://www.typographydeconstructed.com/wp-content/uploads/2010/12/terminal-white.gif" alt="" width="190" height="190" />The end of a stroke that does not include a serif.

Ball terminal is a combination of a dot (tail dot) or circular stroke and the curved bit (hook) at the end of some tails and the end of some arms (a, c, f). Beak terminal refers to the sharp spur or beak at the end of a letterform's arm and the curved bit (terminal) between the beak and the arm.

mw Reference

Growing at the end of a branch or stem.