Definitions
Century Dictionary and Cyclopedia
- n. In ichthyology, the subopercular bone, an inferior one of four opercular bones usually entering into the composition of the gillcover, of which it forms a part of the lower margin. See cuts under opercular and teleost.
- n. In anat. of the brain, a part of an orbital gyre which to some extent covers the insula or island of Reil in front, and is situated under the præoperculum.
Wiktionary
GNU Webster's 1913
- n. (Anat.) The lower opercular bone in fishes.
Etymologies
- sub- + operculum (Wiktionary)
Examples
“The auditory chamber of higher Vertebrates is, therefore, the homologue of the branchial chamber in fish; the opercular bones in fish and the ossicles of the ear in other Vertebrates stand in close relation to this chamber; therefore the opercular bones are the homologues of the ossicles of the ear, the interoperculum corresponding to the malleus, the suboperculum to the lenticular, the minute lower part of the suboperculum to the incus, the operculum to the stapes, and the pre-operculum to the tympanic ring.”
Form and Function A Contribution to the History of Animal Morphology
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