Ctenoid

Ctenoid

Ctenoid means 'having the margin toothed like a comb'. It is used to the scales of some fishes, such as perciforms that have such a toothed margin. Ctenoid scales are essentially cycloid scales with teeth at their posterior edges. It is thought that these teeth help to reduce hydrodynamic drag during swimming. Ctenoid scales are found in many teleosts. Fish with ctenoid scales feel rough if rubbed or stroked from tail to head.

External links

* [http://bioweb.uwlax.edu/zoolab/Table_of_Contents/Lab-9b/Ctenoid/ctenoid.htm "Zoolab article with illustration of ctenoid scale"]


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  • Ctenoid — Cte noid (t[=e] noid or t[e^]n oid), a. (Zo[ o]l.) (a) Having a comblike margin, as a ctenoid scale. (b) Pertaining to the Ctenoidei. n. A ctenoidean. [1913 Webster] …   The Collaborative International Dictionary of English

  • ctenoid — CTENOÍD, Ă adj. în formă de pieptene. (< fr. cténoïde) Trimis de raduborza, 15.09.2007. Sursa: MDN …   Dicționar Român

  • ctenoid — [ten′oid΄, tē′noid΄] adj. [ CTENO + OID] having an edge with projections like the teeth of a comb, as the posterior margin of the scales of certain fishes …   English World dictionary

  • ctenoid — adjective Etymology: International Scientific Vocabulary, from Greek ktenoeidēs, from kten , kteis comb more at pectinate Date: 1872 having the margin toothed < ctenoid scale >; also having or consisting of ctenoid scales < ctenoid fishes > …   New Collegiate Dictionary

  • ctenoid — Having marginal projections that resemble the teeth of a comb …   Fisheries — dictionary

  • ctenoid — adj. [Gr. kteis, comb; eidos, form] Comblike; having a margin of small teeth …   Dictionary of invertebrate zoology

  • ctenoid — /tee noyd, ten oyd/, adj. Zool. 1. comblike or pectinate; rough edged. 2. having rough edged scales. [1830 40; < Gk ktenoeidés like a comb. See CTENO , OID] * * * …   Universalium

  • ctenoid — adjective a) Having a toothed margin, usually fish scales b) Comb like in shape …   Wiktionary

  • ctenoid — adj. rough edged; comblike (Zoology) …   English contemporary dictionary

  • ctenoid — [ ti:nɔɪd] adjective Zoology (of fish scales) having many tiny projections on the edge like the teeth of a comb, as in many bony fishes. Compare with ganoid and placoid. Origin C19: from Gk kteis, kten comb + oid …   English new terms dictionary

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