• WordNet 3.6
    • adj ctenoid resembling a comb; having projections like the teeth of a comb
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Webster's Revised Unabridged Dictionary
    • a Ctenoid tē"noid or tĕn"oid (Zoöl) Having a comblike margin, as a ctenoid scale
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Century Dictionary and Cyclopedia
    • ctenoid 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);
    • ctenoid to a form of dentition in fishes in which the teeth have comb-like ridges.
    • ctenoid Pertaining to the Ctenoidei; having ctenoid scales, as a fish.
    • n ctenoid A fish with ctenoid scales; one of the Ctenoidei.
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Chambers's Twentieth Century Dictionary
    • adj Ctenoid tē′noid comb-shaped, applied by Agassiz to the scales and fins of certain fishes, as the perch, &c
    • adj Ctenoid and n. Ctenoid′ean
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In literature:

C. ctenoides (comb-like); Fig.
"Cactus Culture For Amateurs" by W. Watson
A Ctenoid of Monte Bolca.
"The Testimony of the Rocks" by Hugh Miller