You searched for: “actinoblast
actinoblast (s) (noun), actinoblasts (pl)
The mother cell from which a spicule (small needle-like structure or part) is developed: An actinoblast forms each ray of a sponge's radiate spicule, called a "scleroblast".

The sponges are members of the phylum Porifera.

This entry is located in the following unit: actino-, actin-, actini-, -actinal, actis- + (page 2)