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Definition of Term

placoid
(English) Plate-like; applied to modified scales in some extinct fishes, and in sharks and rays. (See also: scale, sharks, ganoid scales)
placoïde
(French) En forme de plaque ; s'applique aux écailles modifiées de certains poissons fossiles, et chez les raies et requins. (See also: scale, sharks, ganoid scales)
placóide
(Portuguese) Em forma de placa. Aplica-se ás escamas modificadas de alguns peixes já extintos e nos tubarões e raias. (See also: scale, sharks, ganoid scales)

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