spon·dy·lus
"
1
capitalized
: a genus of large, thick, inequivalve, usually spinose and attached, bivalve mollusks (family Spondylidae) that are remarkable for perfection of the hinge
2
-spon·dy·lus
"
: animal having (such) vertebrae
—in generic names
Palaeospondylus
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Merriam-Webster unabridged
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