Definition of Placoid. Meaning of Placoid. Synonyms of Placoid

Here you will find one or more explanations in English for the word Placoid. Also in the bottom left of the page several parts of wikipedia pages related to the word Placoid and, of course, Placoid synonyms and on the right images related to the word Placoid.

Definition of Placoid

Placoid
Placoid Plac"oid, a. [Gr. ?, ?, a tablet + -oid.] (Zo["o]l.) Platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoids.
Placoid
Placoid Plac"oid, n. (Zo["o]l.) (a) Any fish having placoid scales, as the sharks. (b) One of the Placoides.

Meaning of Placoid from wikipedia

- sturgeons and gars. Cartilaginous fishes (sharks and rays) are covered with placoid scales. Some species are covered instead by scutes, and others have no...
- Chondrichthyes are aquatic vertebrates with paired fins, paired nares, placoid scales, conus arteriosus in the heart, and a lack of opercula and swim...
- Acute posterior multifocal placoid pigment epitheliopathy (APMPPE) is an acquired inflammatory uveitis that belongs to the heterogenous group of white...
- an animal. Ganoid scales on a carboniferous fish Amblypterus striatus Placoid scales on a lemon shark (Negaprion brevirostris) Cycloid scales on a common...
- water as they reduce high-velocity flow. The larger the fish, the more placoid scales they are likely to have. These projections are extremely teeth-like...
- classically recognized white dot syndromes include: Acute posterior multifocal placoid pigment epitheliopathy Birdshot chorioretinopathy Multiple evanescent white...
- gills so they can breathe without having to swim. Bony fish do not have placoid scales like cartilaginous fish, instead they consist of three types of...
- dorsoventrally compressed. The entire body is covered by an exoskeleton of placoid scales. The mouth is located on the ventral side and is bound on both sides...
- clefts opening individually to the exterior, rigid dorsal fins and small placoid scales on the skin. The teeth are in several series; the upper jaw is not...
- jaw to have high mobility and protrude outward. The teeth are modified placoid scales that are regularly shed and replaced. In general, the teeth have...