You searched for: “tetractines”
tetractine, tetraxon (s) (noun); tetractines; tetraxons (pl)
A spicule of four equal and similar rays; tetract: The four tetractines of a sponge meet at equal angles.
This entry is located in the following units: actino-, actin-, actini-, -actinal, actis- + (page 6) tetra-, tetr- (page 2) tra-, tract-, trac-, -tractive, -traction, -tracting, treat-, trai- (page 7)