You searched for: “stauractine
stauractine (s) (noun), stauractines (pl)
In invertebrate zoology, a ractinal spicule in which all four rays are in a single plane: The stauractines of the dorsal sponge-layer have two atrophied arms and the other four are in a pattern of a cross.

A "spicule" is a small pointed structure serving as a skeletal element in various marine and freshwater invertebrates, such as sponges and corals.

This entry is located in the following units: actino-, actin-, actini-, -actinal, actis- + (page 6) stauro-, staur- + (page 1)