spicule -- Sister Jen

spic·ule  (spkyl) also spic·u·la (-y-l) n. pl. spic·ules also spic·u·lae (-y-l) A small needlelike structure or part, such as one of the silicate or calcium carbonate processes supporting the soft tissue of certain invertebrates, especially sponges. [Latin spculum; see spiculum.] spicu·lar (-y-lr), spicu·late (-y-lt, -lt) adj.

The American Heritage® Dictionary of the English Language. 

I wonder if Sister Jen might consider going to an acupuncturist who uses spicules to relieve pressure that causes back trouble.