ambulacrum

noun

am·​bu·​la·​crum ˌam-byə-ˈla-krəm 

-ˈlā-

plural ambulacra ˌam-byə-ˈla-krə 

-ˈlā-

: an ambulacral area or part

Word History

Etymology

borrowed from New Latin ambulācrum, going back to Latin, "place for walking, promenade," from ambulāre "to walk, walk for pleasure or health" + -crum, suffix of instruments (dissimilated from *-clum, going back to *-tlom) — more at amble entry 1

First Known Use

1769, in the meaning defined above