Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Biology Comblike.
  • adj. Biology Having marginal projections that resemble the teeth of a comb: a ctenoid fish.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having a toothed margin, usually fish scales
  • adj. Comb-like in shape.
  • n. A ctenoidean.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having a comblike margin, as a ctenoid scale.
  • adj. Pertaining to the Ctenoidei.

from The Century Dictionary and Cyclopedia

  • Comb-like; pectinate: specifically applied— to a form of scales in fishes in which the posterior margin is pectinated, or beset with small spinules (see cut under scale);
  • to a form of dentition in fishes in which the teeth have comb-like ridges.
  • Pertaining to the Ctenoidei; having ctenoid scales, as a fish.
  • n. A fish with ctenoid scales; one of the Ctenoidei.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. resembling a comb; having projections like the teeth of a comb

Etymologies

Greek ktenoeidēs, comblike : kteis, kten-, comb + -oeidēs, -oid.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

  • Pirate perch is a stout, dark-colored fish, with a single dorsal fin and ctenoid scales on the head and body.

    Think Progress » “When I caught a 7.5 pound perch in my lake”

  • I tried to follow Agassiz's scheme of division into the order of ctenoids and ganoids, with the result that I found one of my species of side-swimmers had cycloid scales on one side and ctenoid on the other.

    Louis Agassiz as a Teacher

  • So long as the strongly-armed ganoidal order prevailed in nature, the sharks were furnished with massive crushing teeth; but when the ganoids waned in creation, and the soft-scaled cycloid and ctenoid orders took and amply filled the place which they had left vacant, the well known modern form of sharks 'teeth was introduced, -- a form much rather suited for cutting soft bodies than for crushing hard ones.

    The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed

  • Another kind of scale is the ctenoid which are thin flexible scales where the posterior end has comb-like teeth, and are believed to reduce drag on the fish when swimming in the water.

    CreationWiki - Recent changes [en]

  • The distinction between the ctenoid scale types, therefore, is primarily based upon their form.

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  • Cycloid Fish Scale - The primary types of fish scales include placoid, cosmoid, ganoid, ctenoid, and cycloid scales.

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  • Ctenoid Fish Scale - Three general types of ctenoid scales have been categorized, but each type is composed of two key sections; a rigid surface layer chiefly consisting of crystallized calcium salts and a deeper layer that is formed by collagen-type fibrils.

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  • Basic ctenoid scales, on the other hand, exhibit ctenii, which are formed as separate bony growths distinct from the main body of the scale.

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  • Thin, translucent, and lacking enamel as well as dentine, these modern structures are known as cycloid and ctenoid scales.

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