ˌambyəˈlakrəm also -āk- noun
( plural ambulac·ra -rə)
Etymology: New Latin, from Latin, alley, covered way, from ambulare to walk — more at amble
1. : one of the radially disposed areas of echinoderms along which run the principal nerves, blood vessels, and water tubes and which usually bear rows of locomotive suckers or tentacles that protrude from regular pores
2. : one of the suckers on the feet of mites