placoid

From Ancient Greek πλάξ (pláx, stem plak-) +‎ -oid.

placoid (not comparable)

1. Platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoid fish
   • 1979, Cormac McCarthy, Suttree, Random House, page 68:

     What about the carp? He regarded the two placoid shapes with doubt.

placoid (plural placoids)

1. Such a scale
2. Any fish having placoid scales, such as the sharks
3. A placodioid lichen

• microplacoid

• “placoid”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• podalic, podical