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operculum
operculum (əʊˈpɜːkjʊləm) Pl. -la. [a. L. operculum cover, covering, lid, f. operīre to cover, close: see -culum.] An organ or structure forming or resembling a lid or cover; spec. 1. Zool. a. The gill-cover of a fish; esp. the hindmost and uppermost bone of this.1752 Sir J. Hill Hist. Anim. 225 They...
Oxford English Dictionary
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Operculum (gastropod)
The operculum grows in size as the shell grows, such that the operculum remains in proportion to the apertural size. both the operculum and its host shell.
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Operculum (bryozoa)
In the bryozoan order Cheilostomatida, the operculum is a calcareous or chitinous lid-like structure that protects the opening through which the polypide Many species have modified the operculum in specialized zooids (avicularia) to form a range of mandibles (probably for defense) or hair-like setae (probably
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operculi-
operculi- combining form of L. operculum, as in opercuˈliferous a. [-ferous], having an operculum, operculate; oˈperculiform a. [-form], having the form of a lid or operculum; opercuˈligenous a. [-gen + -ous: cf. alkaligenous], producing an operculum: said of the metapodium of gastropods; opercuˈlig...
Oxford English Dictionary
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Operculum (animal)
The operculum lies on the top rear part of the foot. When the foot is retracted, the operculum is rotated 180° and closes the shell. An operculum (fish), a flap that covers the gills in bony fishes and chimaeras.
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opercular
opercular, a. (n.) (əʊˈpɜːkjʊlə(r)) [f. L. operculum (see below) + -ar1.] 1. Nat. Hist. Of, pertaining to, or of the nature of an operculum; characterized by the presence of an operculum; see also quot. 18571. opercular apparatus, the gill-cover of fishes, consisting of four pieces, the præoperculum...
Oxford English Dictionary
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Operculum (botany)
and an inner operculum formed by the fusion of the sepals. In Plantago, the capsule has an opening covered by an operculum.
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pre-operculum
pre-operculum, præ- (priːəʊˈpɜːkjʊləm) [f. præ, pre- A. 4 + operculum.] 1. Ichth. The foremost of the four bones forming the operculum in fishes.1828 Stark Elem. Nat. Hist. I. 454 Head scaly; operculum with spines, and the preoperculum with dentations. 1880 Günther Fishes 80 The side of the skull, i...
Oxford English Dictionary
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Operculum (brain)
In human brain anatomy, an operculum (Latin, meaning "little lid") (: opercula), may refer to the frontal, temporal, or parietal operculum, which together It can also refer to the occipital operculum, part of the occipital lobe.
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interoperculum
‖ interoperculum Ichthyol. (ˌɪntərəʊˈpɜːkjʊləm) [inter- 2 b.] One of the four bones normally forming the gill-cover, esp. in teleostean and ganoid fishes; usually situated below the præoperculum, and partly between this on one side and the operculum and suboperculum on the other.1855 in Mayne Expos....
Oxford English Dictionary
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Operculum (fish)
The size and shape of the operculum bone is dependent on the organism's location. This provides evidence that there was an evolutionary change in the operculum bone.
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suboperculum
‖ suboperculum (sʌbəʊˈpɜːkjʊləm) [mod.L., f. sub- sub- 2 b (a) + operculum.] 1. Ichth. The bone situated below the operculum in the gill-cover of a fish.1834 M{supc}Murtrie Cuvier's Anim. Kingd. 191 A sort of lid, composed of three bony pieces, the operculum, the sub[o]perculum, and the interopercul...
Oxford English Dictionary
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Operculum papillare
The operculum papillare is the iris found in the eyes of elasmobranchs (skates, sharks and rays).
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岛盖
岛盖(英文:Operculum),可分为额叶岛盖、颞叶岛盖或顶叶岛盖,共同覆盖大脑皮层中的岛叶。
结构
岛盖覆盖岛叶,后者是大脑皮层的一处内陷结构,埋藏在外侧沟深处。其中,额顶叶岛盖(frontoparietal operculum)位于中央前回和中央后回上。
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pre-opercle
pre-oˈpercle Also -cule. Anglicized form of pre-operculum.1858 Mayne Expos. Lex. s.v., A bony formation on which the operculum, or lid of the gills play: the preopercule. 1886 Cassell's Encycl. Dict., Preopercle. So Cent. Dict., etc.
Oxford English Dictionary
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