ramus

noun

1. A small spray or twig.
2. A branching, as of nerves or blood vessels.
3. The stem of a barb of a feather, from which the barbules extend.
4. A bony projection, particularly of the jaw, but also in the groin area, both subject to the maturing process of symphysis.

name

1. Petrus Ramus (1515–1572), French humanist, logician, and educational reformer, originally named Pierre de la Ramée.
2. A surname.