Ramulus

·noun A small branch, or branchlet, of corals, hydroids, and similar organisms.

ramulus
rāmŭlus, i, m. dim. [ramus], a little branch or bough , a twig , sprig , Cato R. R. 101; Cic....

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
ramulus
rāmulus ī, m dim.ramus, a twig, sprig, shoot . ...

An Elementary Latin Dictionary