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adj. Platelike, as the hard toothlike scales of sharks, skates, and rays.

adj. platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoids.

n. Any fish having placoid scales, such as the sharks.

adj. Platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoids.

n. Any fish having placoid scales, as the sharks.

n. One of the Placoides.

Plate-like: noting the dermal investments of sharks, which take the place of true scales and are the ossified papillæ of the cutis.

Having placoid scales, as a fish; belonging to the Placoidei. See cut under scale

n. A member of the Placoidei.

adj. as the hard flattened scales of e.g. sharks

"The new species is highly adapted to hypogean life with very obvious troglobiomorphic features: unpigmented cuticle, an extraordinary lengthening of thorax and appendixes, multiplication of antennomeres and supernumerary placoid sensilla, not just in the apical antennomere but also in the preceding antennomeres."

two-dimensional    planar   

placoid exoskeleton   

platelike