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Definition of Placoid
1. Adjective. As the hard flattened scales of e.g. sharks.
Definition of Placoid
1. a. Platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoids.
2. n. Any fish having placoid scales, as the sharks.
Definition of Placoid
1. Adjective. platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoids. ¹
2. Noun. Any fish having placoid scales, such as the sharks. ¹
¹ Source: wiktionary.com
Definition of Placoid
1. a fish having platelike scales [n -S]
Medical Definition of Placoid
1.
Lexicographical Neighbors of Placoid
Literary usage of Placoid
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Encyclopedia Americana: A Library of Universal Knowledge (1919)
"... pla-koi'de-I, the name of an obsolete grouping of fishes, including those with
placoid ... placoid ..."
2. Practical Geology and Mineralogy: With Instructions for the Qualitative by Joshua Trimmer (1842)
"The placoid fishes (from *Xag a broad plate) are characterized by having the skin
irregularly covered with ... 173 placoid. Ganoid. The ctenoid fishes (from ..."
3. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and (1910)
"The most ancient type of bony skeleton appears to be represented in the placoid
elements such as arc seen in the /CV ^^ skin of the Sela- ЮМ ..."
4. Geology of Oxford and the Valley of the Thames by John Phillips (1871)
"The names are chiefly from Agassiz. Diagram XXXVII. Teeth of placoid Fishes.
Stonesfield. Natural size. 1. ..."
5. The Encyclopedia Americana: A Library of Universal Knowledge (1919)
"... pla-koi'de-I, the name of an obsolete grouping of fishes, including those with
placoid ... placoid ..."
6. Practical Geology and Mineralogy: With Instructions for the Qualitative by Joshua Trimmer (1842)
"The placoid fishes (from *Xag a broad plate) are characterized by having the skin
irregularly covered with ... 173 placoid. Ganoid. The ctenoid fishes (from ..."
7. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and (1910)
"The most ancient type of bony skeleton appears to be represented in the placoid
elements such as arc seen in the /CV ^^ skin of the Sela- ЮМ ..."
8. Geology of Oxford and the Valley of the Thames by John Phillips (1871)
"The names are chiefly from Agassiz. Diagram XXXVII. Teeth of placoid Fishes.
Stonesfield. Natural size. 1. ..."
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