A1M3B3U1L1A1C3R1A1
15 points
AMBULACRA is validvalid
AMBULACRUM, [n]
AMBULACRUM, a radial band in the shell of an echinoderm, bearing rows of pores through which the tube-feet protrude [n]
AMBULACRUM, [n]
AMBULACRUM, a radial band in the shell of an echinoderm, bearing rows of pores through which the tube-feet protrude [n]