compass
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 14:27, 10 September 2013 by Andreas Plank (Talk | contribs)
Echinodermata: Echinoidea) A slender radial piece of the lantern of Aristotle that passes outward from the vicinity of the esophagus.
compass (noun; Old French compasser, go around): (