P3Y4G2I1D2I1A1L1
15 points
PYGIDIAL is validvalid
PYGIDIUM, the posterior region of certain invertebrates [adj]
of or like a pygidium, the posterior division of the body in trilobites [adj]
PYGIDIUM, the posterior region of certain invertebrates [adj]
of or like a pygidium, the posterior division of the body in trilobites [adj]