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Origin of placoid
Words nearby placoid
Example sentences from the Web for placoid
The tail is asymmetrical (heterocercal), and numerous placoid scales (dermal denticles) are embedded in the skin.The New Gresham Encyclopedia|Various
They pass by quite insensible gradations into normal placoid scales, such as cover the general surface of the body.
In some cases the placoid scales are enlarged to form plates or spines capped or coated with enamel.
The Thornback Skate is covered with prickles (placoid scales).Stories of the Universe: Animal Life|B. Lindsay
The teeth of Selachii are fundamentally identical with placoid scales.