The Collaborative International Dictionary
Scrobicula
Scrobicula \Scro*bic"u*la\, n.; pl. Scrobicul[ae]. [NL. See Scrobiculate.] (Zo["o]l.) One of the smooth areas surrounding the tubercles of a sea urchin.
Wiktionary
scrobicula
n. (context zoology English) One of the smooth areas surrounding the tubercles of a sea urchin.